Merge "Individually track vis duration of unseen notifs" into udc-qpr-dev am:...

Merge "Individually track vis duration of unseen notifs" into udc-qpr-dev am: f58e1e47 am: 068416ae

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23904070



Change-Id: I1044a40e58aa6d9329f939ddfbc31881e8beb425
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>