Support ZERO op in ota extractor am: cf323870b4 am: b7a66ff8c1

Original change: https://android-review.googlesource.com/c/platform/system/update_engine/+/2045685

Change-Id: I79c73687b0e13ca45e7f13007849a9a98d6c3a96
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>