Fix GPU Settings force close and misc fixes

* The App shouldn't crash if it can't find the gpu oc path.
  In this case fill in some random information.

* Also start a refreshThread which updates the AeroFragment every second
  to display current informations. The only problem caused by this is,
  it wont update the fragment if the fragment was switched.

Signed-off-by: Alexander Christ <alex.christ@hotmail.de>