Summary:
when conditional rendering is used then picker breaks when the child is null.
This conditional rendering inside Picker fails when a is 1, because child will be null in PickerAndroid.android.js.
```
{
this.state.a === 2 && <Picker.Item label="value" value="value" />
}
```
[ANDROID] [FIXED] - When child is null it returns.
Pull Request resolved: https://github.com/facebook/react-native/pull/23748
Differential Revision: D14319140
Pulled By: cpojer
fbshipit-source-id: 07d48cd054a131e6984cfe3bdce7538ffbc50622
cd18527e77