Merge "Prioritize broadcasts to persistent processes." into udc-dev am: e546f6af

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23223536



Change-Id: I6c9fd6f30cc6f0914a8962c065bedf793385096a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>