Merge "Make unregister receiver "sync"." into tm-dev am: 8af79601 am: ffb61056

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/17663485



Change-Id: Ifb936d426698158d1b7f80c5e27bda500a3c81de
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>