renderApplication() supports async initial render
renderApplication() supports async initial render

Reviewed By: sahrens

Differential Revision: D6339469

fbshipit-source-id: d832de936c50edcdc6953b72b5ad18ce1b652187

ptmt/react-native-macos,exponent/react-native,myntra/react-native,hammerandchisel/react-native,arthuralee/react-native,jevakallio/react-native,rickbeerendonk/react-native,ptmt/react-native-macos,exponent/react-native,hoangpham95/react-native,facebook/react-native,hoastoolshop/react-native,Bhullnatik/react-native,dikaiosune/react-native,facebook/react-native,javache/react-native,kesha-antonov/react-native,javache/react-native,exponent/react-native,facebook/react-native,hoastoolshop/react-native,jevakallio/react-native,ptmt/react-native-macos,facebook/react-native,ptmt/react-native-macos,hammerandchisel/react-native,kesha-antonov/react-native,javache/react-native,hoangpham95/react-native,javache/react-native,hoangpham95/react-native,hammerandchisel/react-native,facebook/react-native,rickbeerendonk/react-native,rickbeerendonk/react-native,myntra/react-native,exponentjs/react-native,exponent/react-native,pandiaraj44/react-native,myntra/react-native,arthuralee/react-native,dikaiosune/react-native,pandiaraj44/react-native,javache/react-native,hoastoolshop/react-native,arthuralee/react-native,dikaiosune/react-native,jevakallio/react-native,Bhullnatik/react-native,dikaiosune/react-native,jevakallio/react-native,pandiaraj44/react-native,dikaiosune/react-native,hoastoolshop/react-native,javache/react-native,jevakallio/react-native,myntra/react-native,ptmt/react-native-macos,ptmt/react-native-macos,rickbeerendonk/react-native,rickbeerendonk/react-native,hoangpham95/react-native,kesha-antonov/react-native,dikaiosune/react-native,Bhullnatik/react-native,pandiaraj44/react-native,facebook/react-native,jevakallio/react-native,exponentjs/react-native,facebook/react-native,Bhullnatik/react-native,janicduplessis/react-native,Bhullnatik/react-native,hammerandchisel/react-native,rickbeerendonk/react-native,hoastoolshop/react-native,hammerandchisel/react-native,facebook/react-native,Bhullnatik/react-native,myntra/react-native,jevakallio/react-native,arthuralee/react-native,janicduplessis/react-native,janicduplessis/react-native,facebook/react-native,hoastoolshop/react-native,hoangpham95/react-native,exponentjs/react-native,myntra/react-native,rickbeerendonk/react-native,hoangpham95/react-native,exponentjs/react-native,exponent/react-native,myntra/react-native,janicduplessis/react-native,hoastoolshop/react-native,hammerandchisel/react-native,jevakallio/react-native,janicduplessis/react-native,exponentjs/react-native,exponent/react-native,kesha-antonov/react-native,kesha-antonov/react-native,exponent/react-native,myntra/react-native,rickbeerendonk/react-native,hammerandchisel/react-native,pandiaraj44/react-native,hammerandchisel/react-native,janicduplessis/react-native,jevakallio/react-native,kesha-antonov/react-native,javache/react-native,kesha-antonov/react-native,Bhullnatik/react-native,exponentjs/react-native,pandiaraj44/react-native,exponent/react-native,pandiaraj44/react-native,exponentjs/react-native,exponentjs/react-native,myntra/react-native,janicduplessis/react-native,hoangpham95/react-native,kesha-antonov/react-native,kesha-antonov/react-native,pandiaraj44/react-native,Bhullnatik/react-native,javache/react-native,dikaiosune/react-native,rickbeerendonk/react-native,hoangpham95/react-native,arthuralee/react-native,hoastoolshop/react-native,javache/react-native,dikaiosune/react-native,ptmt/react-native-macos,ptmt/react-native-macos,janicduplessis/react-native