Merge "Reland "Track per-process freezable state in BroadcastQueue."" into udc-dev am: 39ee2327

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23705789



Change-Id: I75fd46e9f50dae580ba833d02e72e920ff51409f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>