Merge "Delay deleting the blob after the last lease is released." into rvc-dev am: a019160b am: 4c6947fd am: 65c32583

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/11936459

Change-Id: Id0a02803e365b270f9f4a2919d390c7fe866c1ec