Merge "[DO NOT MERGE] Add setting custom MediaButtonReceiver" into rvc-dev am: 2ad21ed9dd am: acd84f39fa

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

Change-Id: I36564d61c8bfb7ec963628156320ca0937c7189a