Merge "Update documentation for TV messages" into udc-dev am: 6a2bf5901e am: c662f27412 am: a577af3512 am: 9c80129dc2

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

Change-Id: I57fd5f19aa520486da3bdf1c17ef0284fac230f8
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>