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

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

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I9ebf4faa472b97ad3f0fd2d256b962deb35dc3d9