Add partial extraction capability to ota_extractor am: c7515d4721 am: 60a1638d34 am: 9e0b5b0d73

Original change: https://android-review.googlesource.com/c/platform/system/update_engine/+/2039503

Change-Id: Icfdc81e0d97daeba73e5deadbe3dbe39e625cc5d