Just tried it on my Shield. Works fine. All TV Go channels stream, and some of the on demand content is in DD5.1 and DD2.0 (or DD+, I don't remember).
Not too sure of the purpose of this being that most of the On Demand content offered up here is available on the provider's (ie: HBO Max) own app, but it's here if you want it. The live streams are useful tho.
You're appreciated!