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/driver/compiler_driver.h b/compiler/driver/compiler_driver.h
index 8db892b..fffa3b3 100644
--- a/compiler/driver/compiler_driver.h
+++ b/compiler/driver/compiler_driver.h
@@ -33,14 +33,14 @@
 #include "base/quasi_atomic.h"
 #include "base/safe_map.h"
 #include "base/timing_logger.h"
-#include "class_reference.h"
 #include "class_status.h"
 #include "compiler.h"
+#include "dex/class_reference.h"
 #include "dex/dex_file.h"
 #include "dex/dex_file_types.h"
 #include "dex/dex_to_dex_compiler.h"
+#include "dex/method_reference.h"
 #include "driver/compiled_method_storage.h"
-#include "method_reference.h"
 #include "thread_pool.h"
 #include "utils/atomic_dex_ref_map.h"
 #include "utils/dex_cache_arrays_layout.h"