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/runtime/jit/jit_code_cache.h b/runtime/jit/jit_code_cache.h
index 16335c6..dfa7ac0 100644
--- a/runtime/jit/jit_code_cache.h
+++ b/runtime/jit/jit_code_cache.h
@@ -25,8 +25,8 @@
 #include "base/macros.h"
 #include "base/mutex.h"
 #include "base/safe_map.h"
+#include "dex/method_reference.h"
 #include "gc_root.h"
-#include "method_reference.h"
 
 namespace art {