Merge "Add an explicit android:exported flag." am: a322e3232b am: 10fe66e166 am: 8062c28100

Original change: https://android-review.googlesource.com/c/platform/development/+/1547214

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I5731ea89669d8b954f730549e263f4aada37306e