Merge "Create_cow: Hash of target blocks should not be stored." into main am: a2cd2202f0

Original change: https://android-review.googlesource.com/c/platform/system/core/+/2759698

Change-Id: Ib652154e55c271260cbf0070af9c96f674c31709
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>