Merge "Post a silent notification if screenshot is dismissed" into rvc-dev am:...

Merge "Post a silent notification if screenshot is dismissed" into rvc-dev am: 18bb8d11 am: 46cf5499 am: e0a089c8 am: be34cde3

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/11809243

Change-Id: I1274983a9fb05514823917d15c282018294c0a00