Updating security string to 2016-09-01 to platform and CTS in preparation for 2016 September OTA am: 4d7c3a4c0d am: 5e9c40c879 am: d46066851f
am: c8b3df9fb8

Change-Id: Ie46aa33c4d927bed0024887c3ef59f45f516e3f9