Merge "Add metrics around scheduling failures." into udc-dev am: 07c181c7

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23089736



Change-Id: Iac6e9edefb7e01d82b9f12e44db0cab849259766
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>