Merge "[Output Swticher] [Metrics] logging mute/unmute event" into udc-qpr-dev...

Merge "[Output Swticher] [Metrics] logging mute/unmute event" into udc-qpr-dev am: df13d6f7 am: 2fae5d7c

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/24439948



Change-Id: Id364d59c6387bd3c2b81d59053043f6b4696a8f6
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>