[DO NOT MERGE] Updating Security String to 2017-08-01 on nyc-dev bug:62388772 am: a847c0b23c am: c486b5d047 am: 92c1ca1f5c  -s ours
am: 5cada70115  -s ours

Change-Id: I2d03b9c0bb0820cea78f4a34ac30a2696c312210