Summary: Move all requires of UIManager to UIManager.js, so we can load the view manager configuration lazily when UIManager is required.
Reviewed By: majak
Differential Revision: D3270147
fb-gh-sync-id: 8208ee8d5919102ea5345e7031af47ee78162fe0
fbshipit-source-id: 8208ee8d5919102ea5345e7031af47ee78162fe0