qios: always auto rotate as specified in Info.plist

Before this patch, we would only rotate if no autoRotationMask was set.
This was a temporary way to lock orientation from code until a better
API for this was in place.
But this causes problems for applications that both wants to auto rotate
but at the same time sets a mask to get QScreen::orientation
updates. So remove this heuristic before application code starts to
depend on it.

Change-Id: Idb54abd471b33afd866322738f4860c57bc9dcf7
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@digia.com>