Camera muting via sensor test pattern

Currently enabled/disabled via
  adb shell cmd media.camera set-camera-mute <1/0>

TODO:
- Connect to the wider sensor muting feature

This is suitable for testing apps to see how they react, and how Pixel phones
implement test patterns.

Test: GoogleCameraApp and AOSP Camera2 on sunfish appear to act as if they were in a dark room,
      no crashes, after calling 'adb shell cmd media.camera set-camera-mute 1'
Bug: 170156750
Change-Id: I85e1d2d6ee7d9bf1aee99c4bc8d5f98d36754228
diff --git a/services/camera/libcameraservice/api2/CameraDeviceClient.cpp b/services/camera/libcameraservice/api2/CameraDeviceClient.cpp
index 6e1aba9..d47014e 100644
--- a/services/camera/libcameraservice/api2/CameraDeviceClient.cpp
+++ b/services/camera/libcameraservice/api2/CameraDeviceClient.cpp
@@ -1532,6 +1532,14 @@
         static_cast<camera_metadata_enum_android_scaler_rotate_and_crop_t>(rotateAndCrop));
 }
 
+bool CameraDeviceClient::supportsCameraMute() {
+    return mDevice->supportsCameraMute();
+}
+
+status_t CameraDeviceClient::setCameraMute(bool enabled) {
+    return mDevice->setCameraMute(enabled);
+}
+
 binder::Status CameraDeviceClient::switchToOffline(
         const sp<hardware::camera2::ICameraDeviceCallbacks>& cameraCb,
         const std::vector<int>& offlineOutputIds,
diff --git a/services/camera/libcameraservice/api2/CameraDeviceClient.h b/services/camera/libcameraservice/api2/CameraDeviceClient.h
index 57688a0..5588285 100644
--- a/services/camera/libcameraservice/api2/CameraDeviceClient.h
+++ b/services/camera/libcameraservice/api2/CameraDeviceClient.h
@@ -189,6 +189,9 @@
 
     virtual status_t      setRotateAndCropOverride(uint8_t rotateAndCrop) override;
 
+    virtual bool          supportsCameraMute();
+    virtual status_t      setCameraMute(bool enabled);
+
     virtual status_t      dump(int fd, const Vector<String16>& args);
 
     virtual status_t      dumpClient(int fd, const Vector<String16>& args);
diff --git a/services/camera/libcameraservice/api2/CameraOfflineSessionClient.cpp b/services/camera/libcameraservice/api2/CameraOfflineSessionClient.cpp
index 62b5479..6765c3b 100644
--- a/services/camera/libcameraservice/api2/CameraOfflineSessionClient.cpp
+++ b/services/camera/libcameraservice/api2/CameraOfflineSessionClient.cpp
@@ -72,6 +72,16 @@
     return OK;
 }
 
+bool CameraOfflineSessionClient::supportsCameraMute() {
+    // Offline mode doesn't support muting
+    return false;
+}
+
+status_t CameraOfflineSessionClient::setCameraMute(bool) {
+    return INVALID_OPERATION;
+}
+
+
 status_t CameraOfflineSessionClient::dump(int fd, const Vector<String16>& args) {
     return BasicClient::dump(fd, args);
 }
diff --git a/services/camera/libcameraservice/api2/CameraOfflineSessionClient.h b/services/camera/libcameraservice/api2/CameraOfflineSessionClient.h
index 839c435..5c5fcda 100644
--- a/services/camera/libcameraservice/api2/CameraOfflineSessionClient.h
+++ b/services/camera/libcameraservice/api2/CameraOfflineSessionClient.h
@@ -76,6 +76,9 @@
 
     status_t setRotateAndCropOverride(uint8_t rotateAndCrop) override;
 
+    bool supportsCameraMute() override;
+    status_t setCameraMute(bool enabled) override;
+
     // permissions management
     status_t startCameraOps() override;
     status_t finishCameraOps() override;