Summary:
This pull requests converts `DrawerLayoutAndroid` from a `createReactClass`-based component to an ES6 class component, removing its use of `NativeMethodsMixin` and `prop-types` in the process.
Unfortunately this couldn't be moved over to a full `forwardRef` to the native component, because it has the methods `openDrawer` and `closeDrawer` as part of its API, and they can't be called directly on the native component. A `createRef`-based ref to the native component can be accessed from the `nativeRef` property of a `DrawerLayoutAndroid` instance if a native ref is needed.
The Flow types for callbacks have also been filled out.
Pull Request resolved: https://github.com/facebook/react-native/pull/21980
Reviewed By: TheSavior
Differential Revision: D12901951
Pulled By: RSNara
fbshipit-source-id: d35fa5f11b1059f49b466b52abeec902db1d22f7
bea3bb6956