Merge "Add the connection state change handle for the volume control profile" into udc-dev am: 2a37e27c am: 54d59b8c

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



Change-Id: I7a9f65a259c8673690d984b20b15b29cfb71ef03
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>