Fix object verification.

Refactor VERIFY_OBJECT_ENABLED to become less brittle to change enum and global
constant.

Change-Id: Ie405106be81dce9a913730c7f46a5659582fa18b
diff --git a/src/jni_internal_test.cc b/src/jni_internal_test.cc
index 4b820f9..67020d8 100644
--- a/src/jni_internal_test.cc
+++ b/src/jni_internal_test.cc
@@ -22,6 +22,7 @@
 #include "common_test.h"
 #include "mirror/abstract_method-inl.h"
 #include "mirror/object_array-inl.h"
+#include "mirror/object-inl.h"
 #include "ScopedLocalRef.h"
 #include "sirt_ref.h"