Fix imports for FlutterApplication (#40100) (#40108)

Fix imports for FlutterApplication

Co-authored-by: Greg Spencer <gspencergoog@users.noreply.github.com>

Author: XilaiZhang

shell/platform/darwin/macos/framework/Source/FlutterApplication.mm

@@ -5,10 +5,10 @@
 #import "flutter/shell/platform/darwin/macos/framework/Headers/FlutterApplication.h"
 #import "flutter/shell/platform/darwin/macos/framework/Source/FlutterApplication_Internal.h"
 
+#import "flutter/shell/platform/darwin/macos/framework/Headers/FlutterAppDelegate.h"
+#import "flutter/shell/platform/darwin/macos/framework/Source/FlutterAppDelegate_Internal.h"
+#import "flutter/shell/platform/darwin/macos/framework/Source/FlutterEngine_Internal.h"
 #include "flutter/shell/platform/embedder/embedder.h"
-#import "shell/platform/darwin/macos/framework/Headers/FlutterAppDelegate.h"
-#import "shell/platform/darwin/macos/framework/Source/FlutterAppDelegate_Internal.h"
-#import "shell/platform/darwin/macos/framework/Source/FlutterEngine_Internal.h"
 
 // An NSApplication subclass that implements overrides necessary for some
 // Flutter features, like application lifecycle handling.