Reapply "Use the number of columns for extra large tiles, or half if past the threshold"

This reverts commit 86bb30d0.
This time fixing the unit tests changing the font scale

Flag: com.android.systemui.qs_ui_refactor_compose_fragment
Bug: 416742299
Test: LargeTileSpanRepositoryTest.kt
Test: LargeTileSpanInteractorTest.kt
Change-Id: Ibd7e996939189edb9ba42158d9639a47f698a022