Merge "Address API feedback for BackupTransport#getBackupManagerMonitor" into udc-dev am: c62b840d am: 2509e292

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/21609424



Change-Id: Ib87f032b458ca53ff4d49871602c7b7caa30b218
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>