If you just want push notifications from ZNC, I wrote a plugin called ZNC Push [1] that can interface with many popular push notification services. I personally use NMA, and have a full writeup about my setup [2]. If there's a service you use that isn't supported, I would gladly accept requests if it's something I can test on my own Android devices.

1: https://github.com/jreese/znc-push 2: http://noswap.com/articles/irc/