Create dex subdirectory

Move all the DexFile related source to a common subdirectory dex/ of
runtime.

Bug: 71361973
Test: make -j 50 test-art-host
Change-Id: I59e984ed660b93e0776556308be3d653722f5223
diff --git a/runtime/type_lookup_table.h b/runtime/type_lookup_table.h
index 780b380..6a6f47f 100644
--- a/runtime/type_lookup_table.h
+++ b/runtime/type_lookup_table.h
@@ -17,7 +17,7 @@
 #ifndef ART_RUNTIME_TYPE_LOOKUP_TABLE_H_
 #define ART_RUNTIME_TYPE_LOOKUP_TABLE_H_
 
-#include "dex_file_types.h"
+#include "dex/dex_file_types.h"
 #include "leb128.h"
 #include "utf.h"