Merge "Don't send broadcast to unprepared apps" into sc-dev am: 887a3931 am:...

Merge "Don't send broadcast to unprepared apps" into sc-dev am: 887a3931 am: 29cccc0b am: c74906a9

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/14531190

Change-Id: I1fafe0ee9d146cbf80f4030ab6eddad4d5348e7e