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/optimizing/nodes.h b/compiler/optimizing/nodes.h
index cbf748d..a8fcea2 100644
--- a/compiler/optimizing/nodes.h
+++ b/compiler/optimizing/nodes.h
@@ -34,12 +34,12 @@
 #include "dex/dex_file.h"
 #include "dex/dex_file_types.h"
 #include "dex/invoke_type.h"
+#include "dex/method_reference.h"
 #include "entrypoints/quick/quick_entrypoints_enum.h"
 #include "handle.h"
 #include "handle_scope.h"
 #include "intrinsics_enum.h"
 #include "locations.h"
-#include "method_reference.h"
 #include "mirror/class.h"
 #include "offsets.h"
 #include "utils/intrusive_forward_list.h"