Merge "Provide a complete definition of FileBlobCache" into main am: 490fceeee0

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/2998285

Change-Id: Ide33405cdc56819b05037d467aa2f693b0164eb8
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>