Merge "Allow cow_version to be overwriteable" into main am: 6a34ceb6 am: fa249501

Original change: https://android-review.googlesource.com/c/platform/build/+/2924921



Change-Id: I7efcfe4247357c51345b5e489a6af5ed2155e85b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>