fix(flutter_todos): zone mismatch error (#4225)

Author: LukasMirbt

examples/flutter_todos/lib/bootstrap.dart

@@ -1,7 +1,7 @@
-import 'dart:async';
 import 'dart:developer';
 
 import 'package:bloc/bloc.dart';
+import 'package:flutter/foundation.dart';
 import 'package:flutter/widgets.dart';
 import 'package:flutter_todos/app/app.dart';
 import 'package:flutter_todos/app/app_bloc_observer.dart';
@@ -13,12 +13,14 @@ void bootstrap({required TodosApi todosApi}) {
     log(details.exceptionAsString(), stackTrace: details.stack);
   };
 
+  PlatformDispatcher.instance.onError = (error, stack) {
+    log(error.toString(), stackTrace: stack);
+    return true;
+  };
+
   Bloc.observer = const AppBlocObserver();
 
   final todosRepository = TodosRepository(todosApi: todosApi);
 
-  runZonedGuarded(
-    () => runApp(App(todosRepository: todosRepository)),
-    (error, stackTrace) => log(error.toString(), stackTrace: stackTrace),
-  );
+  runApp(App(todosRepository: todosRepository));
 }