Move RenderNode to own file

Change-Id: I9380d161fd3ddd7b569c262dd8e7aa0c96151b1e
diff --git a/core/jni/android_view_HardwareLayer.cpp b/core/jni/android_view_HardwareLayer.cpp
index ad2e9ff..4bf5f78 100644
--- a/core/jni/android_view_HardwareLayer.cpp
+++ b/core/jni/android_view_HardwareLayer.cpp
@@ -32,10 +32,10 @@
 #include <SkXfermode.h>
 
 #include <DeferredLayerUpdater.h>
-#include <DisplayList.h>
 #include <LayerRenderer.h>
 #include <SkiaShader.h>
 #include <Rect.h>
+#include <RenderNode.h>
 
 namespace android {