Updating security string to 2016-09-05 in preparation for 2016 September OTA...
Updating security string to 2016-09-05 in preparation for 2016 September OTA for b/30224278 am: a234c54e am: 48e360c7
am: a08cbbb9
Change-Id: Ic0c7a50458cf9967baace9f3a46a5f61013b663d