Summary:
Changelog: [Internal]
`NativeComponentRegistryUnstable.js` has Flow syntax but no `flow` directive. It seems to typecheck fine so I'm adding the directive here. (Plus `format` for good measure.)
Reviewed By: huntie
Differential Revision: D41547266
fbshipit-source-id: 1b6a03c705add91843633166a245d0447a21af6d
Summary:
Without moving this, we would get this warning about a require cycle on the next diff, because DummyUIManager and LazyUIManager both need unstable_hasComponent.
```
(NOBRIDGE) WARN Require cycle: react-native-github/Libraries/NativeComponent/NativeComponentRegistry.js -> react-native-github/Libraries/ReactNative/UIManager.js -> react-native-github/Libraries/ReactNative/DummyUIManager.js -> react-native-github/Libraries/NativeComponent/NativeComponentRegistry.js
Require cycles are allowed, but can result in uninitialized values. Consider refactoring to remove the need for a cycle.
```
Changelog: [Internal]
Reviewed By: philIip, RSNara
Differential Revision: D33511566
fbshipit-source-id: fd8c9732408d08ab17335273f86168bf30747929
Moti Zilberman
Paige Sun