Add ErrorCode::kNotEnoughSpace.

Virtual A/B now requires space in userdata, which may not be enough
during OTA. A kNotEnoughSpace error code is added to indicate such case.

Bug: 138808328
Test: builds

Change-Id: I6bf7964911c8eb3b9df9b8752018925a99876d0f
diff --git a/common/error_code_utils.cc b/common/error_code_utils.cc
index 5bcbaa4..645adc5 100644
--- a/common/error_code_utils.cc
+++ b/common/error_code_utils.cc
@@ -167,6 +167,8 @@
       return "ErrorCode::kUnresolvedHostError";
     case ErrorCode::kUnresolvedHostRecovered:
       return "ErrorCode::kUnresolvedHostRecovered";
+    case ErrorCode::kNotEnoughSpace:
+      return "ErrorCode::kNotEnoughSpace";
       // Don't add a default case to let the compiler warn about newly added
       // error codes which should be added here.
   }