Merge "Structure for screenshot detection notification." into tm-qpr-dev am: 30db92a9

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/21124944



Change-Id: Iafcff215ee6327010fde8e118a344904171a16d0
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>