[DO NOT MERGE] Update Security String to 2017-02-01 on mnc-dev am: f92880e0c7 am: 6083d8337c am: e76d1419c7 am: 0c30223c15  -s ours am: 4758581371 am: 7ab9da0e3e
am: 39fc3e057b

Change-Id: I3319a70c835fcc6f4caec0f0f331c80b0bfff849