TF-4195 Implement add a Label to an email

lib/main/localizations/app_localizations.dart

@@ -5626,4 +5626,20 @@ class AppLocalizations {
       name: 'labelAs',
     );
   }
+
+  String addLabelToEmailSuccessfullyMessage(String labelName) {
+    return Intl.message(
+      'Email added to the "$labelName" label',
+      name: 'addLabelToEmailSuccessfullyMessage',
+      args: [labelName],
+    );
+  }
+
+  String addLabelToEmailFailureMessage(String labelName) {
+    return Intl.message(
+      'Cannot add email to the "$labelName" label',
+      name: 'addLabelToEmailFailureMessage',
+      args: [labelName],
+    );
+  }
 }