Make mediaserver listen to Codec2 services' deaths

Test: Kill media.extractor or mediaswcodec and observe logcat

Bug: 130071409

Change-Id: Ie785642da99dfe4ff13e78d878817dae3de9f34a
diff --git a/media/libmediaplayerservice/DeathRecipient.h b/media/libmediaplayerservice/DeathRecipient.h
new file mode 100644
index 0000000..bf5ae5c
--- /dev/null
+++ b/media/libmediaplayerservice/DeathRecipient.h
@@ -0,0 +1,59 @@
+/*
+ * Copyright 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ANDROID_MEDIASERVICE_DEATHRECIPIENT_H
+#define ANDROID_MEDIASERVICE_DEATHRECIPIENT_H
+
+#include <binder/binder.h>
+#include <hidl/HidlSupport.h>
+
+#include <variant>
+
+class DeathNotifier :
+        public IBinder::DeathRecipient,
+        public ::android::hardware::hidl_death_recipient {
+public:
+    using Service = std::variant<
+            sp<IBinder> const&,
+            sp<android::hidl::base::V1_0::IBase> const&>;
+
+    DeathNotifier(std::variant<sp<IBinder> const&, 
+            const sp<IBinder>& service,
+            const sp<MediaPlayerBase>& listener,
+            int which,
+            const std::string& name);
+    DeathNotifier(
+            const sp<android::hidl::base::V1_0::IBase>& hService,
+            const sp<MediaPlayerBase>& listener,
+            int which,
+            const std::string& name);
+    virtual ~DeathNotifier() = default;
+    virtual void binderDied(const wp<IBinder>& who);
+    virtual void serviceDied(
+            uint64_t cookie,
+            const wp<::android::hidl::base::V1_0::IBase>& who);
+    void unlinkToDeath();
+
+private:
+    sp<IBinder> mService;
+    sp<android::hidl::base::V1_0::IBase> mHService; // HIDL service
+    wp<MediaPlayerBase> mListener;
+    int mWhich;
+    std::string mName;
+};
+
+#endif // ANDROID_MEDIASERVICE_DEATHRECIPIENT_H
+