CEC: Add VTS test to enable audio return channel am: a17d5ae5be am: e7a66a40de am: fa72d25470 am: 35dfeee4cb

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/1579867

Change-Id: I57f3ee3eb89bcee3d06604ce98bfde5690754fcb