Merge "[DO NOT MERGE] Add setting custom MediaButtonReceiver" into rvc-dev am: 2ad21ed9dd am: 7f2fb0b21b am: 45f48234cb

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/11629766

Change-Id: Ica892317386eb3b2585708392821c84ed46677ad