Permissions: Align filter and sort UI with apps list

[d4rken]

What changed

The permissions list now uses the same filter and sort UI as the apps list — a unified bottom sheet instead of separate dialogs. Filter options are grouped into "Source" and "Type" categories with intuitive combination logic: filters within a group are combined with OR, groups are combined with AND.

Both the apps and permissions filter sheets now include a help button explaining the icons and tags shown in each list. The upgrade star has been removed from both toolbars, and the expand/collapse menu in the permissions list now shows only the relevant action based on current state.

Filter and sort option enums now have hardcoded serialization names to prevent silent breakage from future refactoring.

Technical Context

• Permissions filter grouping follows the exact same pattern as apps: Group enum on Filter, matches() with groupBy/all/any
• The old MultiChoiceFilterDialog/SingleChoiceSortDialog are no longer used by the permissions list screen (still used by other screens)
• @SerialName annotations match current enum names — no migration needed, purely forward-protection
• Filter logic change: old was pure AND across all active filters, new is OR-within-group AND-between-groups. Default filters span both groups so the default view is largely unchanged
• The expand/collapse toggle derives state from listData group items — no new ViewModel state needed