After some brute force perusing through the editor APIs looks like EditorUtility.ExtractOggFile does the trick. Seems like a little of an odd place for it but it works. Here is a simple code example to demonstrate for searchers later on

[MenuItem("Assets/Export OGG")]
public static void ExportOgg()
{
        UnityEngine.Object[] oggAsset = Selection.GetFiltered(typeof(UnityEngine.Object), SelectionMode.TopLevel);
       EditorUtility.ExtractOggFile(oggAsset[0],"a/special/place/assetname.ogg");
}

Edit: There is also the new ability build into the engine but of course this comes with some caveats.

• The "StreamingAssets" folder seems to only be recognized in the root level unlike the "Resources" folder.

• The files are moved untouched from their original format. So I wanted Unity's OGG output for a given WAV original, this will not work for me. It plops the WAV into the StreamingAssets folder in the game. Sometimes this is what you might want and sometimes it's not. It seems to me that this is a feature; the file should obey the import settings in the inspector even for streaming.