Improve the way track numbers are handled in the album detail view.
Previously, Auxio would show track numbers by simplying stringifying
the integer and then showing it in a TextView. This was problematic for
two reasons:
- Numerics from other languages like Arabic would not be respected
- Invalid track numbers [e.g 0] would be shown regardless of the
situation.
This commit fixes that by placing all track numbers through a format
string first, and showing a generic song icon instead of a number
whenever the track number is 0.
Completely refactor the detail module. This is for a few reasons:
- Prevent data regeneration every time a fragment re-creates.
- Make DetailModel follow the customs of other ViewModels.
- Simplify layouts into a single detail item to reduce code
complexity.
Currently sorting doesn't work, but that is still being worked out
as the legacy SortMode continues to be phased out of Auxio.
