Disable XOR ops if compression is set to none am: 49c06b2df8

Original change: https://android-review.googlesource.com/c/platform/system/update_engine/+/2886531

Change-Id: I76b5bce2f4e066f7425f3100912a205be6df06f2
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>