Merge "Wait for package_added broadcasts to be handled." into udc-dev am: a9690cc8

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/21697439



Change-Id: I34537cbe6dd682ebf71dfd05e3b8ceb5d642e322
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>