Support additional element/dim information for FieldPacker.

BUG=6009244

Change-Id: I3c439559d61b24b26f9a36f2525f0a0e05b00e77
diff --git a/rsScript.h b/rsScript.h
index 7879ea6..acd6afb 100644
--- a/rsScript.h
+++ b/rsScript.h
@@ -69,6 +69,8 @@
 
     void setSlot(uint32_t slot, Allocation *a);
     void setVar(uint32_t slot, const void *val, size_t len);
+    void setVar(uint32_t slot, const void *val, size_t len, Element *e,
+                const size_t *dims, size_t dimLen);
     void setVarObj(uint32_t slot, ObjectBase *val);
 
     virtual bool freeChildren();