This app was mentioned in 3 comments, with an average of 2.00 upvotes
I was able to forward x11 to android using x server and vx connectbot on android. It's a little clunky, but it works.
Actually you don't need to install Linux under a Chroot anymore, I"ve installed all of my Linux applications directly inside of Chrome OS using the package manager, ChromeBrew. Check it out, it's awesome. You will have to install an Xserver, which can be done through ChromeBrew or even easier and if you have the newest DEV version of Chrome OS installed with the PlayStore, you can just install an Android bases X Server, https://play.google.com/store/apps/details?id=au.com.darkside.XServer&hl=en. Than just use SSH to view your apps. I've even created custom Chrome Apps, which basically just starts a script to startup these applications, icons and all.
There's an xserver for android
here https://play.google.com/store/apps/details?id=au.com.darkside.XServer&hl=en_US
and an SDL one here https://play.google.com/store/apps/details?id=x.org.server&hl=en
Seems to me you should be able to extend the xserver's displays from the pi on to the android with Xdmx. https://www.x.org/releases/X11R7.7/doc/man/man1/Xdmx.1.xhtml
It might actually take some ssh tunneling to get it working though.