Avoid recreating tiles when reducing the amount of QS tiles visible

When going from unfolded to folded, the tiles are the same but we reduce
the amount shown. We can avoid recreating these tiles by simply cleaning
up the extra ones. This fixes the tiles flashing when folding the
device.

Test: manually with foldable
Fixes: 297360184
Flag: None
Change-Id: Ief41a6f9df3835e21991585d932a1c98ac7a44a8