BtHelper: Grant MEDIA_CONTENT_CONTROL permission

* Fix media auto/pause always exexcuted even if there's no media player
* Thanks to https://github.com/kawaaii and Nick for providing infos

Ref:
https: //developer.android.com/reference/android/media/session/MediaSessionManager#getActiveSessions(android.content.ComponentName)
Change-Id: I6dfd1d42ce2aafded343b1c31475c191f014c411

Author: someone5678

AndroidManifest.xml

@@ -30,6 +30,7 @@
     <uses-permission android:name="android.permission.INTERACT_ACROSS_USERS" />
     <uses-permission android:name="android.permission.UPDATE_DEVICE_STATS" />
     <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
+    <uses-permission android:name="android.permission.MEDIA_CONTENT_CONTROL" />
 
     <protected-broadcast android:name="batterywidget.impl.action.update_bluetooth_data" />
 

com.android.bluetooth.bthelper.xml

@@ -10,5 +10,6 @@
         <permission name="android.permission.BLUETOOTH_PRIVILEGED"/>
         <permission name="android.permission.INTERACT_ACROSS_USERS"/>
         <permission name="android.permission.UPDATE_DEVICE_STATS"/>
+        <permission name="android.permission.MEDIA_CONTENT_CONTROL"/>
     </privapp-permissions>
 </permissions>