Merge "Update documentation for TV messages" into udc-dev am: 6a2bf5901e am: 1e68042a64 am: 1c05505e1c am: f0c9332fcc

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

Change-Id: Ib972086030c565b24c5ad47ccaf22a4beb67620b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>