Update Security String to 2016-09-07 to platform and CTS for September respin am: a53b868e6e am: e158db8ad2 am: 68870731a5 am: f7de14b8a1 am: 2d033a9e51
am: 76582b95d1

Change-Id: I824632c35828fb60772af0e8fdc456d93e66f85e