Define light position (using new lighting spec) in Java

Also updates the relative shadow strengths.

Change-Id: I6cac7275d38df98aea9f0dda463cd7207102986a
diff --git a/libs/hwui/OpenGLRenderer.h b/libs/hwui/OpenGLRenderer.h
index f70ae583..c6d9071 100644
--- a/libs/hwui/OpenGLRenderer.h
+++ b/libs/hwui/OpenGLRenderer.h
@@ -131,7 +131,7 @@
 
     ANDROID_API void initProperties();
 
-    virtual void setViewport(int width, int height);
+    virtual void onViewportInitialized();
     virtual status_t prepareDirty(float left, float top, float right, float bottom, bool opaque);
     virtual void finish();
     virtual void interrupt();