This function is no longer an hardcoded list of layout ids. It's
replaced by a linear scan of the previously generated array and a new
corresponding array of resource ids.
`gen_layouts.py` lists the layouts in `res/xml` and generate the
`pref_layout_values` and `pref_layout_entries` arrays into
`res/values/layouts.xml`.
These arrays are hard to maintain as the order has to match, which is
fragile.
This relies on every layouts having a `name` attribute.