Set columns for tablet based on width rather than smallest-width

Test: manually with tablet
Test: manually with folded/unfolded foldable
Test: manually changing display size on devices to smallest and largest
Flag: com.android.systemui.qs_ui_refactor_compose_fragment
Bug: 406456758
Change-Id: Id4924fdc3cf30e46e6286205e261f3d423e5ef12