Merge "Add safety comments." into main am: dcac88ceac am: 383ff05ee9

Original change: https://android-review.googlesource.com/c/platform/system/core/+/2651895

Change-Id: I3af7e8e9e3b3be90d2903f891e4b029576244c20
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>