Merge "Appease UB sanitizer on reading gatekeeper error codes." am: f1473a3ae3 am: 78adc89fcd am: 90de20218c am: 0c7df0e54f

Original change: https://android-review.googlesource.com/c/platform/system/gatekeeper/+/1553309

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I6b7cb809185bd477c713c2ba5655f6c4ff8ca87c