Update keychain code to look like internet examples (still does not work on iOS < 10)
Update keychain code to look like internet examples (still does not work on iOS < 10)

fbshipit-source-id: 0344eea

exponentjs/exponent,exponentjs/exponent,exponent/exponent,exponentjs/exponent,exponentjs/exponent,exponentjs/exponent,exponent/exponent,exponent/exponent,exponentjs/exponent,exponent/exponent,exponent/exponent,exponentjs/exponent,exponent/exponent,exponent/exponent,exponentjs/exponent,exponentjs/exponent,exponent/exponent,exponent/exponent