Support erofs files which have their last block unaligned am: 0503d7af4b am: 743d82578e am: eaab07f1a4

Original change: https://android-review.googlesource.com/c/platform/system/update_engine/+/2578757

Change-Id: I9febd4b15543365fe5732e9163ec3475d8a0e44a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>