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/compiler/optimizing/inliner.h b/compiler/optimizing/inliner.h
index 042eee3..e81d97b 100644
--- a/compiler/optimizing/inliner.h
+++ b/compiler/optimizing/inliner.h
@@ -17,7 +17,7 @@
 #ifndef ART_COMPILER_OPTIMIZING_INLINER_H_
 #define ART_COMPILER_OPTIMIZING_INLINER_H_
 
-#include "dex_file_types.h"
+#include "dex/dex_file_types.h"
 #include "invoke_type.h"
 #include "jit/profile_compilation_info.h"
 #include "optimization.h"