Merge "Add FEATURE_REMOTE_GROUP_PLAYBACK" into rvc-dev am: c0fcd758c4 am: bc6f7b7b4f am: df06fd19f6 am: dbb2bdda63

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/12043613

Change-Id: I9d904bea27b9710105c6390227342e48ad49de8e