Merge "Add a flag to limit notif-seen signal changes to T targeting apps."...

Merge "Add a flag to limit notif-seen signal changes to T targeting apps." into tm-dev am: 92762b94 am: 7fa4cd19 am: ead51eb1

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/18469138



Change-Id: I0b77dd8cfc263c0b9cc8266b6f02e1e6f2ae5e4b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>