Merge "Add system ui background handlers dispatch and delivery logging...

Merge "Add system ui background handlers dispatch and delivery logging thresholds" into udc-dev am: 02557142

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23201203



Change-Id: Ied9bf0b41fae1c5dffa4cc26dc91accd8dc65401
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>