Merge "Clarify format BLOB locking" am: 66cf51232c am: c764d58ed8

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/2381019

Change-Id: I5551eb868e58b8d7e4000b0f5d26e4c07699754c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>