Revert "Revert "Move error_code.h into otautil.""

This reverts commit 26436d6d6010d5323349af7e119ff8f34f85c40c to re-land
"Move error_code.h into otautil.".

This way it stops requiring relative path ".." in LOCAL_C_INCLUDES
(uncrypt and edify). Soong doesn't accept non-local ".." in
"local_include_dirs".

This CL needs to land with device-specific module changes (e.g. adding
the dependency on libotautil).

Test: lunch aosp_{angler,bullhead,dragon,fugu,sailfish}-userdebug;
      mmma bootable/recovery
Change-Id: If193241801af2dae73eccd31ce57cd2b81c9fd96
diff --git a/updater/blockimg.cpp b/updater/blockimg.cpp
index 696cddf..0f83644 100644
--- a/updater/blockimg.cpp
+++ b/updater/blockimg.cpp
@@ -50,8 +50,8 @@
 #include <ziparchive/zip_archive.h>
 
 #include "edify/expr.h"
-#include "error_code.h"
 #include "otafault/ota_io.h"
+#include "otautil/error_code.h"
 #include "print_sha1.h"
 #include "rangeset.h"
 #include "updater/install.h"
diff --git a/updater/install.cpp b/updater/install.cpp
index fc085d5..01210f5 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"
diff --git a/updater/updater.cpp b/updater/updater.cpp
index 309c309..f55a0d3 100644
--- a/updater/updater.cpp
+++ b/updater/updater.cpp
@@ -31,10 +31,10 @@
 #include <ziparchive/zip_archive.h>
 
 #include "edify/expr.h"
-#include "error_code.h"
 #include "otafault/config.h"
 #include "otautil/DirUtil.h"
 #include "otautil/SysUtil.h"
+#include "otautil/error_code.h"
 #include "updater/blockimg.h"
 #include "updater/install.h"