Add missing error space in error message.

Bug: 69425186
Test: vts_treble_vintf_test

Change-Id: I43ae99bf8f7ea55972a64da4ffb5fcb446d21ff0
Merged-In: I43ae99bf8f7ea55972a64da4ffb5fcb446d21ff0
diff --git a/VintfObject.cpp b/VintfObject.cpp
index c10949c..3b34159 100644
--- a/VintfObject.cpp
+++ b/VintfObject.cpp
@@ -613,7 +613,7 @@
         if (targetMatrixHal == nullptr || targetMatrixRange == nullptr) {
             if (error) {
                 *error = toFQNameString(package, servedVersion) +
-                         "is deprecated in compatibility matrix at FCM Version " +
+                         " is deprecated in compatibility matrix at FCM Version " +
                          to_string(targetMatrix.level()) + "; it should not be served.";
             }
             return true;