Move some remaining dex utilities

There were several utilities related to building/walking/testing dex
files that were not in libdexfile.  This change consolidates these.

Bug: 22322814
Test: make -j 50 test-art-host
Change-Id: Id76e9179d03b8ec7d67f7e0f267121f54f0ec2e0
diff --git a/compiler/utils/atomic_dex_ref_map-inl.h b/compiler/utils/atomic_dex_ref_map-inl.h
index 7023b9a..7977e82 100644
--- a/compiler/utils/atomic_dex_ref_map-inl.h
+++ b/compiler/utils/atomic_dex_ref_map-inl.h
@@ -21,10 +21,10 @@
 
 #include <type_traits>
 
-#include "class_reference.h"
+#include "dex/class_reference.h"
 #include "dex/dex_file-inl.h"
-#include "method_reference.h"
-#include "type_reference.h"
+#include "dex/method_reference.h"
+#include "dex/type_reference.h"
 
 namespace art {