Update Security String to 2017-02-01 in klp-dev am: b1a7ec0841 am: 5c99964c63 am: ce2b665128  -s ours am: 2c827418dd am: 380ba6deec
am: 9baf1b5294

Change-Id: I9421f94e2bd13a0e3a2a056072f217cd6bd0fb3c