Add a missing include to display_list_matrix_clip_tracker.h (flutter#38371)

Author: jason-simmons

display_list/display_list_matrix_clip_tracker.h

@@ -10,6 +10,7 @@
 #include "flutter/fml/logging.h"
 #include "third_party/skia/include/core/SkClipOp.h"
 #include "third_party/skia/include/core/SkM44.h"
+#include "third_party/skia/include/core/SkPath.h"
 #include "third_party/skia/include/core/SkRRect.h"
 
 namespace flutter {