Merge "Add test validating CEC messages with unregistered source" am: 3ae4d1c8e1 am: 8bfedb0b52 am: 88bfa915b8

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1511335

Change-Id: I4011c2b07a1e71d315ae665fc6a5e5b642a33f72