Just my though on this,
I think Tidal app itself output bit perfect on andriod phone. Tidal to me sound much better than spotify, KKbox etc whether it is bit perfect or not.
Getting a chifi DAP (that bypass andriod resampling) is a alternative for streaming app that does not output bit perfect (spotify etc). DAP as a source is much better than andriod phone as a source, I personally can here the different in music between the 2. As I am on Tidal, so I usually use andriod phone as a source to DAC when I am outdoor. In room I will still use DAP as source to DAC.
Having bit perfect to me is not a piority, as my sony wm1am2 play music better to my ear, vs ibasso dap that output bit perfect music.
So the answer your first question, use Tidal app on andriod for your RU7 will give u the best result without getting into DAP.
Just my amature experience ..