Summary:
I added troubleshooting docs for connection to the development server from device, otherwise it's maybe hard to find out why it's not working.
Due to a disparity in what GitHub's API return the original PR (https://github.com/facebook/react-native/pull/14885) couldn't get imported, so I created a new PR as hramos suggested.
Closes https://github.com/facebook/react-native/pull/15304
Differential Revision: D5537615
Pulled By: hramos
fbshipit-source-id: b94e887b1b771be9e93854124bd0a56b27fd0097