Add some more DISALLOW_COPY_AND_ASSIGN

May help prevent bugs maybe.

Change-Id: Ie73d469dfcd078492ecb3aa28682b42707221202
diff --git a/runtime/gc/reference_queue.h b/runtime/gc/reference_queue.h
index f7d89d0..c45be85 100644
--- a/runtime/gc/reference_queue.h
+++ b/runtime/gc/reference_queue.h
@@ -106,7 +106,7 @@
   // GC types.
   mirror::Reference* list_;
 
-  DISALLOW_COPY_AND_ASSIGN(ReferenceQueue);
+  DISALLOW_IMPLICIT_CONSTRUCTORS(ReferenceQueue);
 };
 
 }  // namespace gc