Move all copy write processing to later in pipeline am: d795875bd9

Original change: https://android-review.googlesource.com/c/platform/system/update_engine/+/2506303

Change-Id: Ic634c7747e13d3cfcd7f49c0998742c83008db51
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>