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/rsElement.h b/libs/rs/rsElement.h
index 7b5a83d..82da441 100644
--- a/libs/rs/rsElement.h
+++ b/libs/rs/rsElement.h
@@ -28,7 +28,7 @@
 class Element : public ObjectBase
 {
 public:
-    Element(uint32_t count);
+    Element(Context *, uint32_t count);
     ~Element();
 
 
@@ -59,7 +59,7 @@
     ObjectBaseRef<Component> * mComponents;
     //uint32_t *mOffsetTable;
 
-    Element();
+    Element(Context *);
 };