Use std::optional for nullable

AIDL now use std::optional to represent nullable types for efficiency
instead of std::unique_ptr which might cause additional heap allocation.

Bug: 1447732670
Test: m
Change-Id: I9045bc6fc2eb06839203af6db94a80de9b83ad1f
diff --git a/services/camera/libcameraservice/CameraService.cpp b/services/camera/libcameraservice/CameraService.cpp
index f1d5d16..7c1a551 100644
--- a/services/camera/libcameraservice/CameraService.cpp
+++ b/services/camera/libcameraservice/CameraService.cpp
@@ -788,7 +788,7 @@
 
 Status CameraService::makeClient(const sp<CameraService>& cameraService,
         const sp<IInterface>& cameraCb, const String16& packageName,
-        const std::unique_ptr<String16>& featureId, const String8& cameraId, int api1CameraId,
+        const std::optional<String16>& featureId, const String8& cameraId, int api1CameraId,
         int facing, int clientPid, uid_t clientUid, int servicePid, int halVersion,
         int deviceVersion, apiLevel effectiveApiLevel,
         /*out*/sp<BasicClient>* client) {
@@ -944,7 +944,7 @@
     if (!(ret = connectHelper<ICameraClient,Client>(
             sp<ICameraClient>{nullptr}, id, cameraId,
             static_cast<int>(CAMERA_HAL_API_VERSION_UNSPECIFIED),
-            internalPackageName, std::unique_ptr<String16>(), uid, USE_CALLING_PID,
+            internalPackageName, {}, uid, USE_CALLING_PID,
             API_1, /*shimUpdateOnly*/ true, /*out*/ tmp)
             ).isOk()) {
         ALOGE("%s: Error initializing shim metadata: %s", __FUNCTION__, ret.toString8().string());
@@ -1457,7 +1457,7 @@
     String8 id = cameraIdIntToStr(api1CameraId);
     sp<Client> client = nullptr;
     ret = connectHelper<ICameraClient,Client>(cameraClient, id, api1CameraId,
-            CAMERA_HAL_API_VERSION_UNSPECIFIED, clientPackageName, std::unique_ptr<String16>(),
+            CAMERA_HAL_API_VERSION_UNSPECIFIED, clientPackageName, {},
             clientUid, clientPid, API_1, /*shimUpdateOnly*/ false, /*out*/client);
 
     if(!ret.isOk()) {
@@ -1484,7 +1484,7 @@
     Status ret = Status::ok();
     sp<Client> client = nullptr;
     ret = connectHelper<ICameraClient,Client>(cameraClient, id, api1CameraId, halVersion,
-            clientPackageName, std::unique_ptr<String16>(), clientUid, USE_CALLING_PID, API_1,
+            clientPackageName, {}, clientUid, USE_CALLING_PID, API_1,
             /*shimUpdateOnly*/ false, /*out*/client);
 
     if(!ret.isOk()) {
@@ -1559,7 +1559,7 @@
         const sp<hardware::camera2::ICameraDeviceCallbacks>& cameraCb,
         const String16& cameraId,
         const String16& clientPackageName,
-        const std::unique_ptr<String16>& clientFeatureId,
+        const std::optional<String16>& clientFeatureId,
         int clientUid,
         /*out*/
         sp<hardware::camera2::ICameraDeviceUser>* device) {
@@ -1593,7 +1593,7 @@
 template<class CALLBACK, class CLIENT>
 Status CameraService::connectHelper(const sp<CALLBACK>& cameraCb, const String8& cameraId,
         int api1CameraId, int halVersion, const String16& clientPackageName,
-        const std::unique_ptr<String16>& clientFeatureId, int clientUid, int clientPid,
+        const std::optional<String16>& clientFeatureId, int clientUid, int clientPid,
         apiLevel effectiveApiLevel, bool shimUpdateOnly,
         /*out*/sp<CLIENT>& device) {
     binder::Status ret = binder::Status::ok();
@@ -2688,7 +2688,7 @@
 CameraService::Client::Client(const sp<CameraService>& cameraService,
         const sp<ICameraClient>& cameraClient,
         const String16& clientPackageName,
-        const std::unique_ptr<String16>& clientFeatureId,
+        const std::optional<String16>& clientFeatureId,
         const String8& cameraIdStr,
         int api1CameraId, int cameraFacing,
         int clientPid, uid_t clientUid,
@@ -2725,24 +2725,18 @@
 
 CameraService::BasicClient::BasicClient(const sp<CameraService>& cameraService,
         const sp<IBinder>& remoteCallback,
-        const String16& clientPackageName, const std::unique_ptr<String16>& clientFeatureId,
+        const String16& clientPackageName, const std::optional<String16>& clientFeatureId,
         const String8& cameraIdStr, int cameraFacing,
         int clientPid, uid_t clientUid,
         int servicePid):
         mCameraIdStr(cameraIdStr), mCameraFacing(cameraFacing),
-        mClientPackageName(clientPackageName),
+        mClientPackageName(clientPackageName), mClientFeatureId(clientFeatureId),
         mClientPid(clientPid), mClientUid(clientUid),
         mServicePid(servicePid),
         mDisconnected(false),
         mAudioRestriction(hardware::camera2::ICameraDeviceUser::AUDIO_RESTRICTION_NONE),
         mRemoteBinder(remoteCallback)
 {
-    if (clientFeatureId) {
-        mClientFeatureId = std::unique_ptr<String16>(new String16(*clientFeatureId));
-    } else {
-        mClientFeatureId = std::unique_ptr<String16>();
-    }
-
     if (sCameraService == nullptr) {
         sCameraService = cameraService;
     }
diff --git a/services/camera/libcameraservice/CameraService.h b/services/camera/libcameraservice/CameraService.h
index e433544..c5c44a2 100644
--- a/services/camera/libcameraservice/CameraService.h
+++ b/services/camera/libcameraservice/CameraService.h
@@ -50,6 +50,7 @@
 #include <string>
 #include <map>
 #include <memory>
+#include <optional>
 #include <utility>
 #include <unordered_map>
 #include <unordered_set>
@@ -140,7 +141,7 @@
 
     virtual binder::Status     connectDevice(
             const sp<hardware::camera2::ICameraDeviceCallbacks>& cameraCb, const String16& cameraId,
-            const String16& clientPackageName, const std::unique_ptr<String16>& clientFeatureId,
+            const String16& clientPackageName, const std::optional<String16>& clientFeatureId,
             int32_t clientUid,
             /*out*/
             sp<hardware::camera2::ICameraDeviceUser>* device);
@@ -297,7 +298,7 @@
         BasicClient(const sp<CameraService>& cameraService,
                 const sp<IBinder>& remoteCallback,
                 const String16& clientPackageName,
-                const std::unique_ptr<String16>& clientFeatureId,
+                const std::optional<String16>& clientFeatureId,
                 const String8& cameraIdStr,
                 int cameraFacing,
                 int clientPid,
@@ -317,7 +318,7 @@
         const String8                   mCameraIdStr;
         const int                       mCameraFacing;
         String16                        mClientPackageName;
-        std::unique_ptr<String16>       mClientFeatureId;
+        std::optional<String16>         mClientFeatureId;
         pid_t                           mClientPid;
         const uid_t                     mClientUid;
         const pid_t                     mServicePid;
@@ -388,7 +389,7 @@
         Client(const sp<CameraService>& cameraService,
                 const sp<hardware::ICameraClient>& cameraClient,
                 const String16& clientPackageName,
-                const std::unique_ptr<String16>& clientFeatureId,
+                const std::optional<String16>& clientFeatureId,
                 const String8& cameraIdStr,
                 int api1CameraId,
                 int cameraFacing,
@@ -725,7 +726,7 @@
     template<class CALLBACK, class CLIENT>
     binder::Status connectHelper(const sp<CALLBACK>& cameraCb, const String8& cameraId,
             int api1CameraId, int halVersion, const String16& clientPackageName,
-            const std::unique_ptr<String16>& clientFeatureId, int clientUid, int clientPid,
+            const std::optional<String16>& clientFeatureId, int clientUid, int clientPid,
             apiLevel effectiveApiLevel, bool shimUpdateOnly, /*out*/sp<CLIENT>& device);
 
     // Lock guarding camera service state
@@ -1043,7 +1044,7 @@
 
     static binder::Status makeClient(const sp<CameraService>& cameraService,
             const sp<IInterface>& cameraCb, const String16& packageName,
-            const std::unique_ptr<String16>& featureId, const String8& cameraId, int api1CameraId,
+            const std::optional<String16>& featureId, const String8& cameraId, int api1CameraId,
             int facing, int clientPid, uid_t clientUid, int servicePid, int halVersion,
             int deviceVersion, apiLevel effectiveApiLevel,
             /*out*/sp<BasicClient>* client);
diff --git a/services/camera/libcameraservice/api1/Camera2Client.cpp b/services/camera/libcameraservice/api1/Camera2Client.cpp
index 1d62a74..d4e59e6 100644
--- a/services/camera/libcameraservice/api1/Camera2Client.cpp
+++ b/services/camera/libcameraservice/api1/Camera2Client.cpp
@@ -50,7 +50,7 @@
 Camera2Client::Camera2Client(const sp<CameraService>& cameraService,
         const sp<hardware::ICameraClient>& cameraClient,
         const String16& clientPackageName,
-        const std::unique_ptr<String16>& clientFeatureId,
+        const std::optional<String16>& clientFeatureId,
         const String8& cameraDeviceId,
         int api1CameraId,
         int cameraFacing,
diff --git a/services/camera/libcameraservice/api1/Camera2Client.h b/services/camera/libcameraservice/api1/Camera2Client.h
index 3144e0e..c5f0428 100644
--- a/services/camera/libcameraservice/api1/Camera2Client.h
+++ b/services/camera/libcameraservice/api1/Camera2Client.h
@@ -94,7 +94,7 @@
     Camera2Client(const sp<CameraService>& cameraService,
             const sp<hardware::ICameraClient>& cameraClient,
             const String16& clientPackageName,
-            const std::unique_ptr<String16>& clientFeatureId,
+            const std::optional<String16>& clientFeatureId,
             const String8& cameraDeviceId,
             int api1CameraId,
             int cameraFacing,
diff --git a/services/camera/libcameraservice/api1/CameraClient.cpp b/services/camera/libcameraservice/api1/CameraClient.cpp
index 892996c..b860ceb 100644
--- a/services/camera/libcameraservice/api1/CameraClient.cpp
+++ b/services/camera/libcameraservice/api1/CameraClient.cpp
@@ -34,7 +34,7 @@
 
 CameraClient::CameraClient(const sp<CameraService>& cameraService,
         const sp<hardware::ICameraClient>& cameraClient,
-        const String16& clientPackageName, const std::unique_ptr<String16>& clientFeatureId,
+        const String16& clientPackageName, const std::optional<String16>& clientFeatureId,
         int cameraId, int cameraFacing,
         int clientPid, int clientUid,
         int servicePid):
diff --git a/services/camera/libcameraservice/api1/CameraClient.h b/services/camera/libcameraservice/api1/CameraClient.h
index a7eb960..aacb00e 100644
--- a/services/camera/libcameraservice/api1/CameraClient.h
+++ b/services/camera/libcameraservice/api1/CameraClient.h
@@ -68,7 +68,7 @@
     CameraClient(const sp<CameraService>& cameraService,
             const sp<hardware::ICameraClient>& cameraClient,
             const String16& clientPackageName,
-            const std::unique_ptr<String16>& clientFeatureId,
+            const std::optional<String16>& clientFeatureId,
             int cameraId,
             int cameraFacing,
             int clientPid,
diff --git a/services/camera/libcameraservice/api2/CameraDeviceClient.cpp b/services/camera/libcameraservice/api2/CameraDeviceClient.cpp
index ff9d274..6471c1c 100644
--- a/services/camera/libcameraservice/api2/CameraDeviceClient.cpp
+++ b/services/camera/libcameraservice/api2/CameraDeviceClient.cpp
@@ -54,7 +54,7 @@
         const sp<CameraService>& cameraService,
         const sp<hardware::camera2::ICameraDeviceCallbacks>& remoteCallback,
         const String16& clientPackageName,
-        const std::unique_ptr<String16>& clientFeatureId,
+        const std::optional<String16>& clientFeatureId,
         const String8& cameraId,
         int api1CameraId,
         int cameraFacing,
@@ -80,7 +80,7 @@
 CameraDeviceClient::CameraDeviceClient(const sp<CameraService>& cameraService,
         const sp<hardware::camera2::ICameraDeviceCallbacks>& remoteCallback,
         const String16& clientPackageName,
-        const std::unique_ptr<String16>& clientFeatureId,
+        const std::optional<String16>& clientFeatureId,
         const String8& cameraId,
         int cameraFacing,
         int clientPid,
diff --git a/services/camera/libcameraservice/api2/CameraDeviceClient.h b/services/camera/libcameraservice/api2/CameraDeviceClient.h
index 888fcce..c5d6e2a 100644
--- a/services/camera/libcameraservice/api2/CameraDeviceClient.h
+++ b/services/camera/libcameraservice/api2/CameraDeviceClient.h
@@ -50,7 +50,7 @@
     CameraDeviceClientBase(const sp<CameraService>& cameraService,
             const sp<hardware::camera2::ICameraDeviceCallbacks>& remoteCallback,
             const String16& clientPackageName,
-            const std::unique_ptr<String16>& clientFeatureId,
+            const std::optional<String16>& clientFeatureId,
             const String8& cameraId,
             int api1CameraId,
             int cameraFacing,
@@ -175,7 +175,7 @@
     CameraDeviceClient(const sp<CameraService>& cameraService,
             const sp<hardware::camera2::ICameraDeviceCallbacks>& remoteCallback,
             const String16& clientPackageName,
-            const std::unique_ptr<String16>& clientFeatureId,
+            const std::optional<String16>& clientFeatureId,
             const String8& cameraId,
             int cameraFacing,
             int clientPid,
diff --git a/services/camera/libcameraservice/api2/CameraOfflineSessionClient.h b/services/camera/libcameraservice/api2/CameraOfflineSessionClient.h
index 6792039..c59427a 100644
--- a/services/camera/libcameraservice/api2/CameraOfflineSessionClient.h
+++ b/services/camera/libcameraservice/api2/CameraOfflineSessionClient.h
@@ -48,7 +48,7 @@
             const KeyedVector<sp<IBinder>, sp<CompositeStream>>& offlineCompositeStreamMap,
             const sp<ICameraDeviceCallbacks>& remoteCallback,
             const String16& clientPackageName,
-            const std::unique_ptr<String16>& clientFeatureId,
+            const std::optional<String16>& clientFeatureId,
             const String8& cameraIdStr, int cameraFacing,
             int clientPid, uid_t clientUid, int servicePid) :
             CameraService::BasicClient(
diff --git a/services/camera/libcameraservice/common/Camera2ClientBase.cpp b/services/camera/libcameraservice/common/Camera2ClientBase.cpp
index 0a41776..609698c 100644
--- a/services/camera/libcameraservice/common/Camera2ClientBase.cpp
+++ b/services/camera/libcameraservice/common/Camera2ClientBase.cpp
@@ -44,7 +44,7 @@
         const sp<CameraService>& cameraService,
         const sp<TCamCallbacks>& remoteCallback,
         const String16& clientPackageName,
-        const std::unique_ptr<String16>& clientFeatureId,
+        const std::optional<String16>& clientFeatureId,
         const String8& cameraId,
         int api1CameraId,
         int cameraFacing,
diff --git a/services/camera/libcameraservice/common/Camera2ClientBase.h b/services/camera/libcameraservice/common/Camera2ClientBase.h
index 042f5aa..d7506af 100644
--- a/services/camera/libcameraservice/common/Camera2ClientBase.h
+++ b/services/camera/libcameraservice/common/Camera2ClientBase.h
@@ -48,7 +48,7 @@
     Camera2ClientBase(const sp<CameraService>& cameraService,
                       const sp<TCamCallbacks>& remoteCallback,
                       const String16& clientPackageName,
-                      const std::unique_ptr<String16>& clientFeatureId,
+                      const std::optional<String16>& clientFeatureId,
                       const String8& cameraId,
                       int api1CameraId,
                       int cameraFacing,
diff --git a/services/camera/libcameraservice/hidl/HidlCameraService.cpp b/services/camera/libcameraservice/hidl/HidlCameraService.cpp
index 97ba9c4..b381d6a 100644
--- a/services/camera/libcameraservice/hidl/HidlCameraService.cpp
+++ b/services/camera/libcameraservice/hidl/HidlCameraService.cpp
@@ -103,7 +103,7 @@
     }
     sp<hardware::camera2::ICameraDeviceCallbacks> callbacks = hybridCallbacks;
     binder::Status serviceRet = mAidlICameraService->connectDevice(
-            callbacks, String16(cameraId.c_str()), String16(""), std::unique_ptr<String16>(),
+            callbacks, String16(cameraId.c_str()), String16(""), {},
             hardware::ICameraService::USE_CALLING_UID, /*out*/&deviceRemote);
     HStatus status = HStatus::NO_ERROR;
     if (!serviceRet.isOk()) {