Replace $FlowFixMeProps in UnimplementedView (#48810)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/48810

Changelog:
[General][Changed] - Improved Props type in UnimplementedView

Reviewed By: cortinico

Differential Revision: D68437542

fbshipit-source-id: 134b834d77f65a94a6488c21298d79b060ea8109

packages/react-native/Libraries/Components/UnimplementedViews/UnimplementedView.js

@@ -9,14 +9,22 @@
  */
 
 'use strict';
+import type {ViewStyleProp} from '../../StyleSheet/StyleSheet';
+
 import StyleSheet from '../../StyleSheet/StyleSheet';
 import * as React from 'react';
 
+type Props = $ReadOnly<{
+  style?: ?ViewStyleProp,
+  children?: React.Node,
+  ...
+}>;
+
 /**
  * Common implementation for a simple stubbed view. Simply applies the view's styles to the inner
  * View component and renders its children.
  */
-class UnimplementedView extends React.Component<$FlowFixMeProps> {
+class UnimplementedView extends React.Component<Props> {
   render(): React.Node {
     // Workaround require cycle from requireNativeComponent
     const View = require('../View/View');

packages/react-native/Libraries/__tests__/__snapshots__/public-api-test.js.snap

@@ -3897,7 +3897,12 @@ declare export default typeof UnimplementedNativeViewNativeComponent;
 `;
 
 exports[`public API should not change unintentionally Libraries/Components/UnimplementedViews/UnimplementedView.js 1`] = `
-"declare class UnimplementedView extends React.Component<$FlowFixMeProps> {
+"type Props = $ReadOnly<{
+  style?: ?ViewStyleProp,
+  children?: React.Node,
+  ...
+}>;
+declare class UnimplementedView extends React.Component<Props> {
   render(): React.Node;
 }
 declare module.exports: UnimplementedView;