Merge "Add safety comments." into main am: 406d43397c am: 947d407b3c

Original change: https://android-review.googlesource.com/c/platform/system/core/+/2672075

Change-Id: I4f1b988923ea87b03145fe7bf3564c989a2fdcd4
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>