Merge "Update documentation for TV messages" into udc-dev am: 6a2bf5901e am: c662f27412 am: 9330361403

Original change: https://googleplex-android-review.googlesource.com/c/platform/hardware/interfaces/+/23335838

Change-Id: If7694a88fc710f9deb895edb287859160e29c2dd
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>