Merge "Always trigger prop change event for WAIT_FOR_VHAL." into tm-dev am: 9f30b47e16 am: fb94d5d963

Original change: https://googleplex-android-review.googlesource.com/c/platform/hardware/interfaces/+/16981181

Change-Id: Ia0edd469f19dafd6ef2484dcf013f9052b664876