[DO NOT MERGE] Add setting custom MediaButtonReceiver am: 7d8d596370 am: f9992179c7 am: 99a348c706

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

Change-Id: Ie4075f427aa9244a0617f18a607879b9f0bd84c4