Merge "Track per-process freezable state in BroadcastQueue." into udc-dev am: a8dbdd94

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23220096



Change-Id: Ifd16a44e058779acbe20a181f72559a3cae020f0
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>