Update Split button visibility based on DeviceProfile change

- Updating Split button visibility in notifyPageSwitchListener() is sometimes too late and causes OverviewActions failed to re-center after removing Split button
- Instead, update Split button visibility based on DeviceProfile change in updateDimension(), which is the ultimate source of information impacting button visibility

Fix: 321291049
Test: Clear all tasks, fold, launch app, swipe up to Overivew
Flag: None
Change-Id: If518cb02429011fedfb8df3dd05dd7ab180d849a