Merge "Update documentation for TV messages" into udc-dev am: 6a2bf5901e am: c662f27412 am: a577af3512

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

Change-Id: Iae86e45ac659675eda27a4b36cc4bd4fccab2f69
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>