TF-3539 Fix auto complete does not show name

Signed-off-by: dab246 <tdvu@linagora.com>

Author: dab246

lib/features/composer/presentation/widgets/recipient_composer_widget.dart

@@ -606,8 +606,12 @@ class _RecipientComposerWidgetState extends State<RecipientComposerWidget> {
 
   EmailAddress _subAddressingValidatedEmailAddress(EmailAddress emailAddress) {
     try {
-      final mailAddress = MailAddress.validateAddress(emailAddress.emailAddress);
-      return mailAddress.asEmailAddress();
+      if (emailAddress.displayName.isNotEmpty) {
+        return emailAddress;
+      } else {
+        final mailAddress = MailAddress.validateAddress(emailAddress.emailAddress);
+        return mailAddress.asEmailAddress();
+      }
     } catch (e) {
       return emailAddress;
     }