Merge "[DO NOT MERGE] Update platform security string to 2017-10-01 in mnc-dev Bug:64896113" into mnc-dev am: 84557be29b am: bf38f45749 am: 40720f6a25 am: fbd8bcf329  -s ours am: 137d5f095a am: e522ce436f
am: 6613b4e6fc

Change-Id: Ibae3d0687defb616f986ae9b6663a535506a5b8b