Add a CLI option to enable/disable puffdiff am: 957c708edc

Original change: https://android-review.googlesource.com/c/platform/system/update_engine/+/2675710

Change-Id: I8372765370a5314a845a58cdc227b6d38a8de15c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>