Define light position (using new lighting spec) in Java

Also updates the relative shadow strengths.

Change-Id: I6cac7275d38df98aea9f0dda463cd7207102986a
diff --git a/libs/hwui/Caches.cpp b/libs/hwui/Caches.cpp
index 43223ec..77ef637 100644
--- a/libs/hwui/Caches.cpp
+++ b/libs/hwui/Caches.cpp
@@ -688,8 +688,8 @@
 ///////////////////////////////////////////////////////////////////////////////
 
 void Caches::initTempProperties() {
-    propertyAmbientShadowStrength = 25;
-    propertySpotShadowStrength = 25;
+    propertyAmbientShadowStrength = 12;
+    propertySpotShadowStrength = 48;
 
     propertyLightDiameter = -1.0f;
     propertyLightPosY = -1.0f;