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

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

Change-Id: Ic87079d7b227167774896dee0d0ec556c880ee00