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 am: 54d59b8c am: d46d9d47 am: 539b7aab

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



Change-Id: I3f68ffac568788c8bb8ee846e36fa785c75de71b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>