Merge "Cherrypicking flags and override methods for allowing dynamically...

Merge "Cherrypicking flags and override methods for allowing dynamically registered receivers to mark themselves explicitly as exported or not exported." am: 316e0e83 am: 7e5da1ee am: 060b3772 am: 56fe7307 am: 7647fb57

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1836473

Change-Id: I4e54c846faad975c9706e6372500f15d686ce16a