Revert "Move error_code.h into otautil."

This reverts commit 623fe7e701d5d0fb17082d1ced14498af1b44e5b.

Reason for revert: Need to address device-specific modules.

Change-Id: Ib7a4191e7f193dfff49b02d3de76dda856800251
diff --git a/updater/install.cpp b/updater/install.cpp
index 01210f5..fc085d5 100644
--- a/updater/install.cpp
+++ b/updater/install.cpp
@@ -57,10 +57,10 @@
 #include <ziparchive/zip_archive.h>
 
 #include "edify/expr.h"
+#include "error_code.h"
 #include "mounts.h"
 #include "otafault/ota_io.h"
 #include "otautil/DirUtil.h"
-#include "otautil/error_code.h"
 #include "print_sha1.h"
 #include "tune2fs.h"
 #include "updater/updater.h"