Removing focusability from QSPanel

While navigating with keyboard we shouldn't focus on QSPanel as it's not actionable.

Also removing unnecessary a11y ordering because QSPanel is not part of regular a11y ordering.
QSPanel seems to sometimes get a11y focus but I couldn't reach while exploring UI with Talkback - tested on phone/foldable/tablet.

Fixes: 332699488
Flag: None
Test: Traverse (split) shade with keyboard and notice QS panel doesn't get focus

Change-Id: Ie69d204fdafd7554a70a50512eb3db9a2614a8c6