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/quicken_info.h b/runtime/quicken_info.h
index 5b72468..ce11f3c 100644
--- a/runtime/quicken_info.h
+++ b/runtime/quicken_info.h
@@ -17,7 +17,7 @@
 #ifndef ART_RUNTIME_QUICKEN_INFO_H_
 #define ART_RUNTIME_QUICKEN_INFO_H_
 
-#include "dex_instruction.h"
+#include "dex/dex_instruction.h"
 
 namespace art {