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: 8b8132c5

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

Change-Id: I624da8be8d764eb0ca2c9ce846ba555d1b98f7fb