Merge "Add the connection state change handle for the volume control profile"...

Merge "Add the connection state change handle for the volume control profile" into udc-dev am: 2a37e27c

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23276876



Change-Id: I7dd43a48243a2f1217fa9522f636adceac327c74
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>