Fix sideload OTA breakage am: 99cbbe7c4c

Original change: https://android-review.googlesource.com/c/platform/system/update_engine/+/2918733

Change-Id: I4d6e8f86824aac93a176a4633edaa7b4b660de5c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>