Merge "Simplify keyguard notification count logic" into tm-dev am: f9e8a7fe

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/17693164



Change-Id: I7880ba6ed70064a2faf42dce984686b034544b9a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>