Merge QP1A.190404.001

Conflicts:
  src/com/android/bluetooth/a2dp/A2dpService.java
  src/com/android/bluetooth/btservice/AdapterService.java
  src/com/android/bluetooth/btservice/PhonePolicy.java
  src/com/android/bluetooth/btservice/ServiceFactory.java
  src/com/android/bluetooth/hfp/HeadsetPhoneState.java

Change-Id: If2c92164431ba2716434f4f3d23f171310bf2781