Summary:
Previously, I added accessibilityRole and accessibilityStates as View Properties.
In this diff, I added accessibilityRole and accessibilityStates to ReactNativeViewAttributes.UIView, which is used for viewconfig in some components.
The NativeMethodsMixing uses the set view config when invoking `setNativeProps`, and it's used to make those components look like an actual native component class.
Reviewed By: PeteTheHeat
Differential Revision: D8976524
fbshipit-source-id: 16a5ba7d91ee9cfb6488c2d94f7f23b9093e5b81