StatusBar: Remove PropTypes (#21293)
StatusBar: Remove PropTypes (#21293)

Summary:
Part of: https://github.com/react-native-community/discussions-and-proposals/issues/29

This PR removes the remaining PropTypes from `StatusBar` and moves its flowtypes to its own definition.
Pull Request resolved: https://github.com/facebook/react-native/pull/21293

Differential Revision: D10012963

Pulled By: TheSavior

fbshipit-source-id: 7fb4e416eb49e7860809a3e2aaf157590908687d

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