Merge "Create /metadata/staged-install dir to store staged install failure...

Merge "Create /metadata/staged-install dir to store staged install failure reasons" into rvc-dev am: 000226f1 am: 07bc6980

Original change: https://googleplex-android-review.googlesource.com/c/platform/system/core/+/11408963

Change-Id: Ia23257f73b381b6e38147a01a7ebdc79c6eb04a2