Update Security String to 2017-04-05 on nyc-dev am: 8ee3a4cef1 am: e69e40cc34 am: 9cff197d92 am: d7e9856cc6
am: e93cf611e6

Change-Id: Idaec9aaa1489472e8dfcd2ce979dca2d1a47a6f9