fix(rn,polyfills) use core-js for promise polyfills

We use the same on the web, on browsers that don't support them.

package.json

     "null-loader": "4.0.1",
     "optional-require": "1.0.3",
     "pixelmatch": "5.3.0",
-    "promise.allsettled": "1.0.4",
-    "promise.withresolvers": "1.0.3",
     "punycode": "2.3.0",
     "react": "18.2.0",
     "react-dom": "18.2.0",

react/features/mobile/polyfills/browser.js

 import BackgroundTimer from 'react-native-background-timer';
 import { TextDecoder, TextEncoder } from 'text-encoding';
 
-import 'promise.allsettled/auto'; // Promise.allSettled.
-import 'promise.withresolvers/auto'; // Promise.withResolvers.
+import 'core-js/features/promise/all-settled'; // Promise.allSettled.
+import 'core-js/features/promise/with-resolvers'; // Promise.withResolvers.
 import 'react-native-url-polyfill/auto'; // Complete URL polyfill.
 
 import Storage from './Storage';