[DO NOT MERGE] Updating Security String to 2017-04-05 on klp-dev am: 502366cdc4 am: 3ce29b8a94 am: b0cef41b76  -s ours am: 8f86884a97  -s ours am: c901cec8b2
am: a150db6547  -s ours

Change-Id: I8f82b3f68accb57beaeb25dd88b057062597bfdf