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

Change-Id: I635c6627d098b661fb9b0ba1bd42fa6d7277d287
diff --git a/libs/hwui/Renderer.h b/libs/hwui/Renderer.h
index 320895c..d68b932 100644
--- a/libs/hwui/Renderer.h
+++ b/libs/hwui/Renderer.h
@@ -233,7 +233,7 @@
 // Canvas draw operations - special
 // ----------------------------------------------------------------------------
     virtual status_t drawLayer(Layer* layer, float x, float y) = 0;
-    virtual status_t drawDisplayList(RenderNode* displayList, Rect& dirty,
+    virtual status_t drawRenderNode(RenderNode* renderNode, Rect& dirty,
             int32_t replayFlags) = 0;
 
     // TODO: rename for consistency