Hello,
I am not speaking for Hortonworks but I get the impression that Hue will never be an official part of HDP. You can however install it separately – even with binaries supplied by Hortonworks. However those binaries always seem to lag behind the official release.
So can you use hue/beeswax with HDP? Yes. But you have to fetch and install it yourself.
I believe the long term aim is to have Ambari as good as Hue and in recent versions you can do beeswax like stuff.