Update Security String to 2016-09-06 to platform and CTS for September Security (+Quadrooter,-PZ) am: fa721839b2 am: fdf4c8d8a6 am: 21b4d9e01c am: 1f85078b1e am: 782967785e am: 831bee139d am: 2141e6de1a
am: 3346f2d039

Change-Id: I4dfe3de72e9253d00e148262be579eff0002a4eb