Merge "Standardise safety comments for unsafe blocks, and add some more." into main am: f56c8b1e

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/2652159



Change-Id: Icde7d5d5c608986b799d91890b79b7f31d9bb8e4
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>