Add more specific error codes for uncrypt failures

Add the error codes when we fail to find the realpath, or fail to find
the block_device.

Bug: 63737759
Test: mma
Change-Id: Icf15368ad3e7345c747d9083da2f049cc8acd571
diff --git a/error_code.h b/error_code.h
index 9fe047c..4cbad4c 100644
--- a/error_code.h
+++ b/error_code.h
@@ -68,6 +68,8 @@
   kUncryptFileCloseError,
   kUncryptFileRenameError,
   kUncryptPackageMissingError,
+  kUncryptRealpathFindError,
+  kUncryptBlockDeviceFindError,
 };
 
 #endif // _ERROR_CODE_H_