Thanks again xbach, I eventually would have looked on github myself.
I really would not recommend rooting your device. A rogue app could access Mycelium database, for example, and grab the private keys.
I disagree with this, there is no logic to it. My desktop computer is "rooted", it's impossible for it not to be. Never had a problem with other Apps run with root privileges have stolen BTC or broken something.
I've only ever used rooted smartphones, and have had zero issues in nearly 5 years. And it's full of benefits: a culture of high quality community-driven software development now exists, and it can be used to protect your privacy, especially from Google. My smartphone runs without a Google Account, or Google Apps. Google have very little footprint in my phone, and I'm certainly not using any Google Services software. I know that rooting phones can easily brick the phone, that's why I'm super careful when doing it.
I strongly recommend that all Android users check to see how well their phone is supported with after-market software, and if the support is good, root. Then say goodbye to Google.