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
Change-Id: Id53bea6c0a355d54c461b987e5a992c9211e6d32