plasma-mobile: incorrect powerdevil path in plasma-phone script

/usr/bin/plasma-phone script contains incorrect path to start powerdevil:

# start powerdevil
/usr/lib/libexec/org_kde_powerdevil &

which does not exist.

But powerdevil package installs its binary into another location:

$ apk info -L powerdevil
powerdevil-5.15.3-r0 contains:
etc/dbus-1/system.d/org.kde.powerdevil.backlighthelper.conf
etc/dbus-1/system.d/org.kde.powerdevil.discretegpuhelper.conf
etc/xdg/autostart/powerdevil.desktop
usr/lib/org_kde_powerdevil               <====------------------
usr/lib/qt5/plugins/powerdevilrunscriptaction_config.so

So it probably should be changed to:

# start powerdevil
/usr/lib/org_kde_powerdevil &