Merge "Updating comments on cow layout" into main am: 1b52ac6efe am: 822c758b84 am: a800e97543 am: 139c4aaa36

Original change: https://android-review.googlesource.com/c/platform/system/core/+/2754949

Change-Id: I5562a8541703450c0be9b8b9a179db6fca7fc052
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>