[automerger] Fix security hole in GateKeeperResponse. am: e74cae8f7c am: b1141b6ff0 am: 1cd9e8096f am: 6dfc8d8d4d am: a3c1de7e49 am: 4acf4fabf4 am: 40317127f4 am: 159cd14334 am: 24587d57cf am: 0fa9328b80
am: 51ca967453

Change-Id: I8f4ae84ea5606706b0390b25c6aa5b5e94c2e9ce