Add cli option to enable multi-threaded compression am: 6bef4902b4

Original change: https://android-review.googlesource.com/c/platform/system/update_engine/+/2453985

Change-Id: I1c84eec284f2284dc079c22fefc29b45fed1fd02
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>