Merge "Add scheduled job high water mark metric." into udc-dev am: 1588d4ac am: 6e644c2c

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23036898



Change-Id: Ia2b822ba2957b52ce9c73fd47ab32d59fcbd4a39
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>