Update Security String to 2016-09-07 to platform and CTS for September respin am: a53b868e6e am: e158db8ad2 am: 68870731a5 am: f7de14b8a1
am: 2d033a9e51

Change-Id: Iacc3e198cff56bdd396a64e594d19e4ca635c3e4