Merge "Mention in safety comment that Parcel can't be Sync." into main am: 3411550782

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/2799654

Change-Id: I98e8440968e97d6ba943f0aba205a71b4de52ce0
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>