Add view config babel plugin

Summary:
This diff adds a babel plugin for the generated view configs which will inline them in the file instead of needing to check the view configs in (fb only)

The way it works is:
- babel reads the code
- looks for type alias `CodegenNativeComponent` in `*NativeComponet.js` files
- run the flow parser on the file source to create a schema
- run the schema into codegen to get the view config source code
- inject the generated source code back into the NativeComponent.js file
- remove the original export
- profit

After this diff we will remove the `js1 build viewconfigs` command and the checked-in NativeViewConfig.js files

Note: since this plugin is not published to open source, for now OSS will continue using the `requireNativeComponent` function

Reviewed By: cpojer

Differential Revision: D15516062

fbshipit-source-id: a8efb077773e04fd9753a7036682eeaae9175e09

Libraries/Components/RefreshControl/PullToRefreshViewNativeComponent.js

@@ -10,17 +10,13 @@
 
 'use strict';
 
-import type {
-  BubblingEvent,
-  WithDefault,
-  CodegenNativeComponent,
-} from '../../Types/CodegenTypes';
-
-const requireNativeComponent = require('../../ReactNative/requireNativeComponent');
-
+import type {BubblingEvent, WithDefault} from '../../Types/CodegenTypes';
+import type {NativeComponent} from '../../Renderer/shims/ReactNative';
 import type {ColorValue} from '../../StyleSheet/StyleSheetTypes';
 import type {ViewProps} from '../View/ViewPropTypes';
 
+const requireNativeComponent = require('../../ReactNative/requireNativeComponent');
+
 type NativeProps = $ReadOnly<{|
   ...ViewProps,
 
@@ -48,13 +44,10 @@ type NativeProps = $ReadOnly<{|
   refreshing: WithDefault<boolean, false>,
 |}>;
 
-type PullToRefreshViewType = CodegenNativeComponent<
-  'PullToRefreshView',
-  NativeProps,
->;
-
-// TODO: Switch this over to require('./PullToRefreshNativeViewConfig')
+// TODO: Switch this over to CodegenNativeComponent
 // once the native components are renamed in paper and fabric
+type PullToRefreshViewType = Class<NativeComponent<NativeProps>>;
+
 module.exports = ((requireNativeComponent(
   'RCTRefreshControl',
 ): any): PullToRefreshViewType);