This app was mentioned in 2 comments, with an average of 2.50 upvotes
This is the best one I've found so far:
https://play.google.com/store/apps/details?id=pl.batorro.swddeckbuilder
It could use a little UI work and probably a new app icon (or at least some color changes to it), but it's fairly simple and fully functional.
I can actually recommend this app https://play.google.com/store/apps/details?id=pl.batorro.swddeckbuilder
Has all cards, works offline as well and is free.