Update 'DisplayList' vs 'RenderNode' naming in several places

Change-Id: I635c6627d098b661fb9b0ba1bd42fa6d7277d287
diff --git a/libs/hwui/OpenGLRenderer.h b/libs/hwui/OpenGLRenderer.h
index 346a65c..066b267 100644
--- a/libs/hwui/OpenGLRenderer.h
+++ b/libs/hwui/OpenGLRenderer.h
@@ -158,7 +158,7 @@
     int saveLayerDeferred(float left, float top, float right, float bottom,
             const SkPaint* paint, int flags);
 
-    virtual status_t drawDisplayList(RenderNode* displayList, Rect& dirty, int32_t replayFlags = 1);
+    virtual status_t drawRenderNode(RenderNode* displayList, Rect& dirty, int32_t replayFlags = 1);
     virtual status_t drawLayer(Layer* layer, float x, float y);
     virtual status_t drawBitmap(const SkBitmap* bitmap, float left, float top,
             const SkPaint* paint);