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/instruction_builder.cc b/compiler/optimizing/instruction_builder.cc
index a38e271..c7aef37 100644
--- a/compiler/optimizing/instruction_builder.cc
+++ b/compiler/optimizing/instruction_builder.cc
@@ -20,9 +20,9 @@
 #include "base/arena_bit_vector.h"
 #include "base/bit_vector-inl.h"
 #include "block_builder.h"
-#include "bytecode_utils.h"
 #include "class_linker.h"
 #include "data_type-inl.h"
+#include "dex/bytecode_utils.h"
 #include "dex/dex_instruction-inl.h"
 #include "driver/compiler_driver-inl.h"
 #include "driver/dex_compilation_unit.h"