[DO NOT MERGE] Updating Security String to 2017-08-05 on nyc-dev bug:62388772 am: 2b93753bc4 am: 8828ffc63e am: edda32c5e3  -s ours
am: af114e0286  -s ours

Change-Id: Ie4d5456a8883b1f3e86af1204f0a627ddd0f9dbe