Cleanup all uses of internal flow type React$ElementRef in react-native (#45904)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/45904

Flow will error on these dollar types soon. For all the ones changed here, they can all be further simplified.

Changelog: [Internal]

Reviewed By: gkz

Differential Revision: D60786768

fbshipit-source-id: e26bf0be1c4a933fc0bd8b59827e10cbd7242a83

packages/rn-tester/js/examples/DrawerLayoutAndroid/DrawerLayoutAndroidExample.js

@@ -24,7 +24,7 @@ import {
 
 const Drawer = () => {
   const theme = useContext(RNTesterThemeContext);
-  const drawer = useRef<null | React$ElementRef<any>>(null);
+  const drawer = useRef<null | any>(null);
   const [drawerPosition, setDrawerPosition] = useState('left');
   const changeDrawerPosition = () => {
     if (drawerPosition === 'left') {