Moving cow_size_updates to before partitions are parsed. am: 4565a2e8e6 am: c3d9de7ba9 am: 3a9f96aefd

Original change: https://android-review.googlesource.com/c/platform/system/update_engine/+/2224657

Change-Id: I1a4d99077d26a60f03e13528a3301686405e7335
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>