SystemUI: fix disapearing clock

When recreateStatusBar() gets called, we set the clock view visibility
to invisible. This is usually set by DISABLE systemui flags so when
those flags go to update, the clock visibility never gets updated, since
the system has no idea it needs to do that. Always update the clock
visibilities when updating its parent view.

Change-Id: I15668374cadded4129f5f75536a77dc3da546f6f
Signed-off-by: Roman Birg <roman@cyngn.com>
(cherry picked from commit cdeabda3)