[automerger] [DO NOT MERGE] Updating security string for nyc-dev to 2018-05-01 bug: 74345861 am: 7c0f23dce5 am: 21f45f7edc am: 5a2c0096d5 am: bc62637ffa skipped: 262656a47f
am: c3dd369446

Change-Id: If6822cab153c266841fc35fcfa2bb38a4ef4ab95