[macOS] Fix mouse cursor being replaced by AppKit (flutter/engine#36283)

engine/src/flutter/shell/platform/darwin/macos/framework/Source/FlutterView.mm

@@ -114,6 +114,15 @@
   return YES;
 }
 
+- (void)cursorUpdate:(NSEvent*)event {
+  // When adding/removing views AppKit will schedule call to current hit-test view
+  // cursorUpdate: at the end of frame to determine possible cursor change. If
+  // the view doesn't implement cursorUpdate: AppKit will set the default (arrow) cursor
+  // instead. This would replace the cursor set by FlutterMouseCursorPlugin.
+  // Empty cursorUpdate: implementation prevents this behavior.
+  // https://github.com/flutter/flutter/issues/111425
+}
+
 - (void)viewDidChangeBackingProperties {
   [super viewDidChangeBackingProperties];
   // Force redraw