Fix bug where uncompressed files do not get extent info populated am: 56c70698b3 am: 5384db4ebb

Original change: https://android-review.googlesource.com/c/platform/system/update_engine/+/2105504

Change-Id: Ide920e7ec95f2149d832883a7bfe124c1dae15a9
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>