Merge changes from topic "VSyncDispatch_unregisterCallback" into udc-dev am:...

Merge changes from topic "VSyncDispatch_unregisterCallback" into udc-dev am: 6b567cad am: 22d3dee5

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/native/+/22817336



Change-Id: I45ebc8efe8cad6dfdacc58bf27aa9b423d7b55e6
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>