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/rsProgramVertex.h b/libs/rs/rsProgramVertex.h
index 32d147c..b3a8b8d 100644
--- a/libs/rs/rsProgramVertex.h
+++ b/libs/rs/rsProgramVertex.h
@@ -30,7 +30,7 @@
 public:
     const static uint32_t MAX_LIGHTS = 8;
 
-    ProgramVertex(Element *in, Element *out);
+    ProgramVertex(Context *, Element *in, Element *out);
     virtual ~ProgramVertex();
 
     virtual void setupGL(const Context *rsc, ProgramVertexState *state);