add messageFilter property in messageListView

example/lib/main.dart

@@ -59,7 +59,7 @@ void _initNotifications(Client client) {
     if (connector.token.value != null) {
       client.addDevice(
         connector.token.value,
-        Platform.isAndroid ? 'firebase' : 'apn',
+        Platform.isAndroid ? PushProvider.firebase : PushProvider.apn,
       );
     }
   });
@@ -127,7 +127,7 @@ class ChannelListPage extends StatelessWidget {
               '\$in': [StreamChat.of(context).user.id],
             }
           },
-          // sort: [SortOption('last_message_at')],
+          sort: [SortOption('last_message_at')],
           pagination: PaginationParams(
             limit: 20,
           ),