Merge "Delay deleting the blob after the last lease is released." into rvc-dev...

Merge "Delay deleting the blob after the last lease is released." into rvc-dev am: a019160b am: 4c6947fd am: 65c32583 am: 2e5c73ea

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

Change-Id: Ia07f35286b37a05ccc0d01011dd463d35a2d67ed