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.cpp b/libs/hwui/renderthread/CanvasContext.cpp
index 48cd8fc..839ef91 100644
--- a/libs/hwui/renderthread/CanvasContext.cpp
+++ b/libs/hwui/renderthread/CanvasContext.cpp
@@ -410,9 +410,10 @@
     // and such to prevent from trying to render into this surface
 }
 
-void CanvasContext::setup(int width, int height) {
+void CanvasContext::setup(int width, int height, const Vector3& lightCenter, float lightRadius) {
     if (!mCanvas) return;
     mCanvas->setViewport(width, height);
+    mCanvas->initializeLight(lightCenter, lightRadius);
 }
 
 void CanvasContext::setOpaque(bool opaque) {