chore: Follow up shortcut icon android

lib/utils/push_helper.dart

@@ -286,7 +286,7 @@ Future<void> _tryPushHelper(
   final title = event.room.getLocalizedDisplayname(MatrixLocals(l10n));
 
   if (PlatformInfos.isAndroid && messagingStyleInformation == null) {
-    await _setShortcut(event, l10n, title, roomAvatarFile);
+    _setShortcut(event, l10n, title, roomAvatarFile);
   }
 
   await flutterLocalNotificationsPlugin.show(
@@ -302,7 +302,7 @@ Future<void> _tryPushHelper(
 /// Creates a shortcut for Android platform but does not block displaying the
 /// notification. This is optional but provides a nicer view of the
 /// notification popup.
-Future<void> _setShortcut(
+void _setShortcut(
   Event event,
   L10n l10n,
   String title,