feat: hide defaultOnNewActivity from state export

Author: xsahil03x

packages/stream_feeds/lib/stream_feeds.dart

@@ -3,4 +3,4 @@ export 'package:stream_core/stream_core.dart';
 export 'src/feeds_client.dart';
 export 'src/generated/api/api.dart' hide User;
 export 'src/models.dart';
-export 'src/state.dart';
+export 'src/state.dart' hide defaultOnNewActivity;