Merge "le_audio: Introduce connection state handling for LE Audio group" into stage-aosp-master am: 2f0430af32 am: 22c3b6feeb

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15736950

Change-Id: I305a2964dc943105b3a8e70865171d3f94b6fea3