Merge "Add support to update the throttle time of silent updates" into sc-dev am: b55a5da7 am: 3c8bfa2d

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/14909659

Change-Id: Ia8d785525f60d6aa48330d2f9c635cdc4f4de55e