Fix plain VAB OTA failure am: 0a6ac9f16c

Original change: https://android-review.googlesource.com/c/platform/system/update_engine/+/2506304

Change-Id: I22fd7bfdef52c778405e8b80062de8eae80345c0
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>