Fix Flow errors in ListViewData source.
Fix Flow errors in ListViewData source.

Differential Revision: D5839414

fbshipit-source-id: 7a0c7b3d27be728c74e08d3a8209deb3ca68dd63

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