Hmmm... Odd that it would have an issue witth Android and Chrome, ever since my kids took over the computers in the house, that is like the #1 thing I use with my Astrobox. I just open my chrome up to astroprint.com and login. Then I send my job like normal... sometimes if I'm already running the job and I just shortcut to the known IP address of my astrobox and login with the regular astroprint.com login password.
If it's Android / Chrome issue, it's gotta be something else you have installed also... I've gone though 5 phones in the last 4 months and never had any issue with any of them working with my astrobox via chrome. Even used my wife's Asus tablet and chrome on that.