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/debug/elf_debug_line_writer.h b/compiler/debug/elf_debug_line_writer.h
index d7fd524..9910e7a 100644
--- a/compiler/debug/elf_debug_line_writer.h
+++ b/compiler/debug/elf_debug_line_writer.h
@@ -24,7 +24,7 @@
 #include "debug/dwarf/headers.h"
 #include "debug/elf_compilation_unit.h"
 #include "debug/src_map_elem.h"
-#include "dex_file-inl.h"
+#include "dex/dex_file-inl.h"
 #include "linker/elf_builder.h"
 #include "oat_file.h"
 #include "stack_map.h"