Merge "Setting to control seen notification filtering" into tm-qpr-dev am:...

Merge "Setting to control seen notification filtering" into tm-qpr-dev am: c8a6db40 am: 2891e33e

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Settings/+/21022067



Change-Id: I2ad7d426b9dbee84b440029a5d34124406ec78b6
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>