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

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

Change-Id: I21aa81eff89ceb30bfb315a443b192783a41598e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>