Fixed infinite loop inside verity write and --disable_fec_computation am: 701cb6f654

Original change: https://android-review.googlesource.com/c/platform/system/update_engine/+/2467467

Change-Id: I9da03b575cef7c61dedbbfa52127838516aa6bf8
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>