Merge "Explicitly add "flush-broadcast-loopers" option." into udc-dev am:...

Merge "Explicitly add "flush-broadcast-loopers" option." into udc-dev am: 5835f7d5 am: 903ab0ae am: 933fffc8

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23328616



Change-Id: I8928c4805c6ebf4f7ff553b10b0781061f13d52a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>