keyboardManager: Use layout id when reapplying

keyboardManager: Use layout id when reapplying

`_doApply()` expects the id rather than the layout info itself. Passing
the layout info caused the lookup to fail and the function to exit
early. This was preventing `xkb-option` or `xkb-model` settings from
applying when changed.

Fixes: 0f9034687 ("status/keyboard: Adapt to external source of keyboard layout")
Closes: https://gitlab.gnome.org/GNOME/gnome-shell/-/work_items/9197
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/4205>