Both autodetection functionality and the configuration dialog assumed detection
to only return one found device. This isn't necessarily true, especially since
some players can be detected but detecting their mountpoint might be ambiguous
(only if no previous Rockbox installation is present).
Instead of returning individual results (found "ok" player, found "error"
player etc.) return a list containing an entry for each player. Current
autodetection code will never return more than one entry since it doesn't
handle multiple devices yet, and the configuration dialog will show an error if
multiple devices are found. Thus there is no user visible change yet. Both
autodetection and configuration dialog can now get extended to handle multiple
devices.
Change-Id: I79b763dbd6e7111783194bcc22ab7cc06a4061c1
Those functions are rather general, so put them into the Utils class instead.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@30146 a1c6a512-1295-4272-9138-f99709370657
