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Summary:
Curently FlatList does not implement setting native props directly like the old ListView did. This pr introduce the `setNativeProps` function which delegates to MetroListView or VirtualizedList. Thos don't have `setNativeProps` handling either, so, I delegated further to the respective ListView and Scroll components, which do have handling for it, thus, allowing to set the native props through FlatList.
Create a project with a FlatList and change a native property using `setNativeProps`:
```javascript
componentDidMount() {
setInterval(() => {
this.list.setNativeProps({ style: {backgroundColor:"white"} })
}, 1000)
}
render() {
return (
<View style={styles.container}>
<FlatList ref={component => this.list = component}
style={{backgroundColor:"black"}}
data={[{key: 'a'}, {key: 'b'}]}
renderItem={({item}) => <Text>{item.key}</Text>} />
</View>
)
}
```
Fixes #13501
Closes https://github.com/facebook/react-native/pull/13529
Differential Revision: D5283593
Pulled By: sahrens
fbshipit-source-id: 8f96f88e286042d82452fef924689b5a8a783987