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

Change-Id: I1d9f7c840f236c1a4a009cab84d8ba4a987eeba7