Merge "Merge "Document the standby bucket guarantee" into sc-dev am:...

Merge "Merge "Document the standby bucket guarantee" into sc-dev am: 52b72fab am: 46fb2e36" into sc-v2-dev-plus-aosp am: 2cabc563

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15182383

Change-Id: Ib54460578a1839cf61291b2f3eccd622e94910a5