Remove isNewAndroidEmbeddingEnabled flag when reading an existing pro… (#42684)

diff --git a/packages/flutter_tools/test/general.shard/macos/cocoapods_test.dart b/packages/flutter_tools/test/general.shard/macos/cocoapods_test.dart
index b81afb1..7f76b5a 100644
--- a/packages/flutter_tools/test/general.shard/macos/cocoapods_test.dart
+++ b/packages/flutter_tools/test/general.shard/macos/cocoapods_test.dart
@@ -273,7 +273,7 @@
         ..writeAsStringSync('Existing release config');
 
       final FlutterProject project = FlutterProject.fromPath('project');
-      await injectPlugins(project);
+      await injectPlugins(project, checkProjects: true);
 
       final String debugContents = projectUnderTest.ios.xcodeConfigFor('Debug').readAsStringSync();
       expect(debugContents, contains(