Merge "Add a new cmd to wait for a specific broadcast to be dispatched." into...

Merge "Add a new cmd to wait for a specific broadcast to be dispatched." into udc-dev am: 4bd98b45 am: 9989b3f9

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22957180



Change-Id: I997a9b2856006fe1063798522d0a3df613378294
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>