Change flow types of RefreshControl.size prop

Summary:
This diff changes the flow types of RefreshControl.size prop from 'int' to string'. For more context see previous diff of the stack.
This diff will be landed as soon as the native release containing D25933458 (65975dd) goes to production.

It's important to clarify that there are currently no usages of this prop in production

Changelog: [Android][Changed] - RefreshControl.size prop changed its type to string, the valid values are: 'default' and 'large'

Reviewed By: JoshuaGross

Differential Revision: D25933457

fbshipit-source-id: 2f34566f2f8a097e6d40f63c09ecb3ada2fd8409

Author: mdvacca

Libraries/Components/RefreshControl/AndroidSwipeRefreshLayoutNativeComponent.js

@@ -41,7 +41,7 @@ type NativeProps = $ReadOnly<{|
    */
   progressBackgroundColor?: ?ColorValue,
   /**
-   * Size of the refresh indicator, see RefreshControl.SIZE.
+   * Size of the refresh indicator.
    */
   size?: WithDefault<'default' | 'large', 'default'>,
   /**

Libraries/Components/RefreshControl/RefreshControl.js

@@ -22,18 +22,6 @@ import PullToRefreshViewNativeComponent, {
   Commands as PullToRefreshCommands,
 } from './PullToRefreshViewNativeComponent';
 
-let RefreshLayoutConsts: any;
-if (Platform.OS === 'android') {
-  const AndroidSwipeRefreshLayout = require('../../ReactNative/UIManager').getViewManagerConfig(
-    'AndroidSwipeRefreshLayout',
-  );
-  RefreshLayoutConsts = AndroidSwipeRefreshLayout
-    ? AndroidSwipeRefreshLayout.Constants
-    : {SIZE: {}};
-} else {
-  RefreshLayoutConsts = {SIZE: {}};
-}
-
 type IOSProps = $ReadOnly<{|
   /**
    * The color of the refresh indicator.
@@ -63,12 +51,9 @@ type AndroidProps = $ReadOnly<{|
    */
   progressBackgroundColor?: ?ColorValue,
   /**
-   * Size of the refresh indicator, see RefreshControl.SIZE.
+   * Size of the refresh indicator.
    */
-  size?: ?(
-    | typeof RefreshLayoutConsts.SIZE.DEFAULT
-    | typeof RefreshLayoutConsts.SIZE.LARGE
-  ),
+  size?: ?('default' | 'large'),
   /**
    * Progress view top offset
    */
@@ -137,8 +122,6 @@ export type RefreshControlProps = $ReadOnly<{|
  * in the `onRefresh` function otherwise the refresh indicator will stop immediately.
  */
 class RefreshControl extends React.Component<RefreshControlProps> {
-  static SIZE: any = RefreshLayoutConsts.SIZE;
-
   _nativeRef: ?React.ElementRef<
     | typeof PullToRefreshViewNativeComponent
     | typeof AndroidSwipeRefreshLayoutNativeComponent,