Merge "Merge "[DO NOT MERGE] Updating Security String to 2017-09-01...

Merge "Merge "[DO NOT MERGE] Updating Security String to 2017-09-01 Bug:63846344" into mnc-dev am: 65b4d916 am: 60d6fe75 am: cfbb865e am: 2d28e037  -s ours am: 15d200c3 am: 0d1b7e18 am: 25eee603  -s ours am: a562f661  -s ours am: a65c0351  -s ours am: 1215b2f7  -s ours am: 5c7aef37  -s ours am: ff701132 am: 302f80a9" into oc-dr1-dev-plus-aosp