If you are sick of the lack of full native USB Audio support in Android, please flood them with requests about it.
Click new issue and enter the issue. Under template, choose "Feature Request" because, as I learned first hand, they simply close the request to fix this if you select bug/defect.
Thanks and maybe this will help shake something out!
We did this with jellybean and Google either didn't understand what the hell we wanted or they just don't care.
I see no reason this cannot be enabled I mean most of the DACs don't require a driver! I also see no reason why a developr cannot enable it and get rid of the resampling android does also but noooooo.... No one seems to be able to do it. Again why this is I cannot even begin to understand. There must be some unforseen restriction stopping it.