Summary:
This PR updates #6851 from srikanthkh, fixing coding conventions and javadoc, and adding a test plan.
Added testing functions into the WebSocketExample page of the UIExplorer, including a tiny http server to set a cookie on demand. Instructions included in the UIExplorer app.
Closes https://github.com/facebook/react-native/pull/9114
Differential Revision: D4140534
Pulled By: lacker
fbshipit-source-id: e020ad0c6d1d3ea09c0c3564c1795b4e1bc4517d
Antoine Rousseau