Summary:
There was no easy way to pull up the dev menu in the tvOS simulator
Run the UIExplorer demo and press cmd+d to bring up the menu
Closes https://github.com/facebook/react-native/pull/13584
Differential Revision: D4916967
Pulled By: javache
fbshipit-source-id: 27f50031f65f35dad46ad5ade7b52c7d350b31a2