use_modular_headers (#42204)

diff --git a/dev/integration_tests/ui/ios/Runner/AppDelegate.m b/dev/integration_tests/ui/ios/Runner/AppDelegate.m
index dfa4361..31917e8 100644
--- a/dev/integration_tests/ui/ios/Runner/AppDelegate.m
+++ b/dev/integration_tests/ui/ios/Runner/AppDelegate.m
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "AppDelegate.h"
-#include "GeneratedPluginRegistrant.h"
+#import "AppDelegate.h"
+#import "GeneratedPluginRegistrant.h"
 
 @implementation AppDelegate