Summary:
This adds cookie clearing support for iOS to match the existing support on Android. Helpful for resetting the app to a clean state (say, when logging a user out).
Closes https://github.com/facebook/react-native/pull/9264
Differential Revision: D3776492
Pulled By: javache
fbshipit-source-id: 59ae19ac09d3cf0d0e229cd9e8e30865e65ca96c