Merge "Add binary to write basic COW" into main am: 0fc7feeafb am: e42df43569 am: a37a965ccd

Original change: https://android-review.googlesource.com/c/platform/system/core/+/2763849

Change-Id: I941814ed00dc5ac54c80cc979b697fa38e2d7c8b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>