Define light position (using new lighting spec) in Java

Also updates the relative shadow strengths.

Change-Id: I6cac7275d38df98aea9f0dda463cd7207102986a
diff --git a/libs/hwui/renderthread/CanvasContext.h b/libs/hwui/renderthread/CanvasContext.h
index a793d42..4232f27 100644
--- a/libs/hwui/renderthread/CanvasContext.h
+++ b/libs/hwui/renderthread/CanvasContext.h
@@ -51,7 +51,7 @@
     bool initialize(EGLNativeWindowType window);
     void updateSurface(EGLNativeWindowType window);
     void pauseSurface(EGLNativeWindowType window);
-    void setup(int width, int height);
+    void setup(int width, int height, const Vector3& lightCenter, float lightRadius);
     void setOpaque(bool opaque);
     void makeCurrent();
     void prepareDraw(const Vector<DeferredLayerUpdater*>* layerUpdaters, TreeInfo& info);