Improve renderscript context teardown.  Track object in the system and then force their cleanup by releasing all user references once destroy context is called.  Java layer will no longer send destroy notifications for objects garbage collected once a context is destroyed.
diff --git a/libs/rs/rsLight.h b/libs/rs/rsLight.h
index b0c3386..d8796e6 100644
--- a/libs/rs/rsLight.h
+++ b/libs/rs/rsLight.h
@@ -29,7 +29,7 @@
 class Light : public ObjectBase
 {
 public:
-    Light(bool isLocal, bool isMono);
+    Light(Context *, bool isLocal, bool isMono);
     virtual ~Light();
 
     // Values, mutable after creation.