Move RenderNode to own file

Change-Id: I9380d161fd3ddd7b569c262dd8e7aa0c96151b1e
diff --git a/libs/hwui/DeferredLayerUpdater.h b/libs/hwui/DeferredLayerUpdater.h
index d124cde..cf745ee 100644
--- a/libs/hwui/DeferredLayerUpdater.h
+++ b/libs/hwui/DeferredLayerUpdater.h
@@ -22,10 +22,10 @@
 #include <SkMatrix.h>
 #include <utils/StrongPointer.h>
 
-#include "DisplayList.h"
 #include "Layer.h"
 #include "OpenGLRenderer.h"
 #include "Rect.h"
+#include "RenderNode.h"
 
 namespace android {
 namespace uirenderer {