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

Change-Id: I7918cab321e5fbd9a1ed2f220387b715f5ae0dbc