react-native-pushy适配harmony (#461)

* init

* update

* udpate

* update

* update

* update

* add pushy build time logic

Example/harmony_use_pushy/__tests__/App.test.tsx

@@ -0,0 +1,17 @@
+/**
+ * @format
+ */
+
+import 'react-native';
+import React from 'react';
+import App from '../App';
+
+// Note: import explicitly to use the types shiped with jest.
+import {it} from '@jest/globals';
+
+// Note: test renderer must be required after react-native.
+import renderer from 'react-test-renderer';
+
+it('renders correctly', () => {
+  renderer.create(<App />);
+});