Define light position (using new lighting spec) in Java

Also updates the relative shadow strengths.

Change-Id: I6cac7275d38df98aea9f0dda463cd7207102986a
diff --git a/libs/hwui/Layer.cpp b/libs/hwui/Layer.cpp
index de2fcf4..6a2ef2a 100644
--- a/libs/hwui/Layer.cpp
+++ b/libs/hwui/Layer.cpp
@@ -214,7 +214,7 @@
     DeferStateStruct deferredState(*deferredList, *renderer,
             RenderNode::kReplayFlag_ClipChildren);
 
-    renderer->initializeViewport(width, height);
+    renderer->setViewport(width, height);
     renderer->setupFrameState(dirtyRect.left, dirtyRect.top,
             dirtyRect.right, dirtyRect.bottom, !isBlend());