update_engine: use cow_size_info am: 09d022d905

Original change: https://android-review.googlesource.com/c/platform/system/update_engine/+/2829130

Change-Id: I087c6300764daeaf7195532db15cf6d3c5b51e2c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>