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

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

Change-Id: I5412f3519245db6608c778f96ef27bcd5ebe584a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>