Expose findNodeAtPoint API to JS
Expose findNodeAtPoint API to JS

Summary:
This diff implements the findNodeAtPoint API into UIManagerBinding to allow JS to call this method

changeLog: [Internal]

Reviewed By: shergin

Differential Revision: D19190284

fbshipit-source-id: 3a65a2238f964ce031b12c8cf264cdacb6cc8f2e

exponent/react-native,arthuralee/react-native,hammerandchisel/react-native,javache/react-native,facebook/react-native,pandiaraj44/react-native,hammerandchisel/react-native,hoangpham95/react-native,javache/react-native,pandiaraj44/react-native,exponent/react-native,hoangpham95/react-native,exponentjs/react-native,hammerandchisel/react-native,exponent/react-native,exponentjs/react-native,exponent/react-native,facebook/react-native,arthuralee/react-native,exponentjs/react-native,pandiaraj44/react-native,hoangpham95/react-native,exponentjs/react-native,arthuralee/react-native,janicduplessis/react-native,myntra/react-native,myntra/react-native,hammerandchisel/react-native,myntra/react-native,myntra/react-native,janicduplessis/react-native,hoangpham95/react-native,hoangpham95/react-native,javache/react-native,pandiaraj44/react-native,janicduplessis/react-native,javache/react-native,javache/react-native,myntra/react-native,hammerandchisel/react-native,facebook/react-native,exponentjs/react-native,janicduplessis/react-native,hoangpham95/react-native,exponentjs/react-native,exponent/react-native,janicduplessis/react-native,hammerandchisel/react-native,hammerandchisel/react-native,javache/react-native,pandiaraj44/react-native,javache/react-native,myntra/react-native,myntra/react-native,javache/react-native,facebook/react-native,hoangpham95/react-native,facebook/react-native,arthuralee/react-native,facebook/react-native,facebook/react-native,arthuralee/react-native,janicduplessis/react-native,hoangpham95/react-native,exponent/react-native,exponent/react-native,hammerandchisel/react-native,janicduplessis/react-native,myntra/react-native,myntra/react-native,exponent/react-native,exponentjs/react-native,janicduplessis/react-native,pandiaraj44/react-native,pandiaraj44/react-native,javache/react-native,facebook/react-native,exponentjs/react-native,pandiaraj44/react-native,facebook/react-native