Merge "Secure setting to control seen notif filter" into tm-qpr-dev am: d0fea880 am: 2cea9842

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/20620796



Change-Id: I0c4c56c0801af56526e5b91a197eb5a7d599122c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>