Merge "Add a lock when writing temporary files in BootReceiver" into main am: 70c967aedd am: 3ef744be8a

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/2843853

Change-Id: Ia365ffddf2d73feb3577e448d4079e14464d0167
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>