AP Tests mangle /home when run on phablet devices

[Nicholas Skaggs]

The autopilot test suite doesn't properly mock an environment before running tests leaving your /home/Music folder mangled on phablet devices are running. The tests should setup a temporary environment and not touch your /home or /home/Music folders.

[Nicholas Skaggs (nskaggs)]

I'll note the code to do this is already present but has been skipped when running on phablet devices (anything running with click). Work needs to be done to support phablet devices and have them use the same process.

[Alan Pope 🍺🐧🐱 🦄 (popey)]

This is quite frustrating in that every time I run autopilot tests on my device I lose my entire music collection and have to put it all back again. We shouldn't do that.

[Ubuntu Phone Apps Jenkins Bot (ubuntu-phone-apps-jenkins-bot)]

Fix committed into lp:music-app at revision None, scheduled for release in music-app, milestone 1.0