Summary:
@public The make current RCTShadowView support RTL layout.
1 Change all left/right to start/end for margin, padding, boarder and position
2 Calculate position in the same way as margin, padding and boarder
Reviewed By: fkgozali
Differential Revision: D3619292
fbshipit-source-id: eaaa6faeee93c964d59bb6f498d89effc09ed567