Fix value reading in custom Text and Remarkup fields in EditEngine

Summary: Ref T10004. I missed these previously, so they didn't work quite right. Restore them to glory.

Test Plan: Edited remarkup and text custom fields on an Owners package.

Reviewers: chad

Reviewed By: chad

Maniphest Tasks: T10004

Differential Revision: https://secure.phabricator.com/D14821

src/infrastructure/customfield/standard/PhabricatorStandardCustomFieldRemarkup.php

@@ -103,4 +103,8 @@ final class PhabricatorStandardCustomFieldRemarkup
     return false;
   }
 
+  public function getConduitEditParameterType() {
+    return new ConduitStringParameterType();
+  }
+
 }

src/infrastructure/customfield/standard/PhabricatorStandardCustomFieldText.php

@@ -71,4 +71,8 @@ final class PhabricatorStandardCustomFieldText
     return false;
   }
 
+  public function getConduitEditParameterType() {
+    return new ConduitStringParameterType();
+  }
+
 }