Fix up bar transitions on low end devices

 - Don't allow dark icons, because the backdrop is always dark.
 - Don't show the view when we aren't showing notification icons or
   system info, because the view may need to be transparent.

Test: manual
Change-Id: I5572a6379ceb605b21a1982db00fdf1659593b8a
Fixes: 62549040
2 files changed