Merge "libsnapshot_cow: Prepare device to boot from pre-created snapshots"...

Merge "libsnapshot_cow: Prepare device to boot from pre-created snapshots" into main am: 6b78aac2 am: eaf919aa am: 87a38fab

Original change: https://android-review.googlesource.com/c/platform/system/core/+/2746258



Change-Id: I95cf525ae1a11bb1f538653d578937d1c4b8e5b3
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>