Use isPWA utility function instead

Summary: As a follow-up from the utility created on the previous diff

Reviewed By: aigoncharov

Differential Revision: D50885337

fbshipit-source-id: 6bc0c942b3d96eb020ec15395f34d5794ba2ae15

desktop/flipper-ui-core/src/chrome/PWAppInstallationWizard.tsx

@@ -12,6 +12,7 @@ import {Image, Modal, Button} from 'antd';
 import {getFlipperLib, Layout, _NuxManagerContext} from 'flipper-plugin';
 import {getRenderHostInstance} from 'flipper-frontend-core';
 import isProduction from '../utils/isProduction';
+import {isPWA} from '../utils/pwa';
 
 type Props = {
   onHide: () => void;
@@ -55,7 +56,7 @@ export function shouldShowPWAInstallationWizard(): boolean {
     return false;
   }
 
-  if (window.matchMedia('(display-mode: standalone)').matches) {
+  if (isPWA()) {
     tracker.track('pwa-installation-wizard-should-show', {
       show: false,
       reason: 'Display mode is standalone, seems is already running as PWA',