Another vote for pokerstars android client. I prefer playing on my laptop but android app saved me in several cases when i was not in home. If you ask about hud - i have never seen any for android and i don't think that there will be one due to 2 main reasons:
1. Android does not allow overlay of one app over the other. You can switch between them but not overlay one over the other.
2. Pokerstars android client do not allow saving of
hands history unlike the windows app so hud can not easily read and import the hands. I think that this is intentionally as android unlike windows have much better app separation and pokerstars can not monitor for applications which are forbidden by their rules.
I personally do not see any of these 2 changing soon so i do not expect hud for android soon.