Hi TechGuyz
The Wandboard with the NXP i.MX6 DualLite seems nice for Android.
Even if the board is on the market for quite a while it is still well supported and recently the guys pushed Android 6.0 a.k.a. Marshmallow out, see here:
http://www.wandboard.org/
They also have the full source code available for download as well as a Demo images available.
That seems good for a) getting the full source code to compile your own image or b) debug on a working image if you hit problems.
They also have a good Forum with a active community offering support for Android, but also other Linux based Operating systems like KODI, Ubuntu and so on. (http://forums.wandboard.org/)
Also the Wandboard has support for Android 5, Android 4.4 Android 4.2, so it seems like it is a well developed product.
I'm more from the Hardware point and I like it because it uses a Module approach. Means there is a SOM (System-on-Module) on a Carrier board, where you can later change the CPU board. OK, thats more a industry feature, but like I said, I'm more HW...
So from Software point of view (especially Android) it looks like a good product with a smooth start.
Note/Disclosure: I have working contact to the Wandboard Team from time to time, so my view might be not neutral and you might want get more than just my feedback!