feat: make autocomplete accesible and la readable

app/controllers/locations_controller.rb

@@ -103,7 +103,7 @@ private
   end
 
   def location_params
-    required_params = params.require(:location).permit(:postcode, :name, :units, :type_of_unit, :add_another_location, :startdate, :mobility_type).merge(scheme_id: @scheme.id)
+    required_params = params.require(:location).permit(:postcode, :name, :units, :type_of_unit, :add_another_location, :startdate, :mobility_type, :location_admin_district).merge(scheme_id: @scheme.id)
     required_params[:postcode] = PostcodeService.clean(required_params[:postcode]) if required_params[:postcode]
     required_params
   end

app/views/locations/la_fallback.html.erb

@@ -336,10 +336,10 @@
 
       <%= f.govuk_collection_select :location_admin_district,
                                     las,
-                                    :id,
+                                    :name,
                                     :name,
                                     label: { hidden: true },
-                                    "data-controller": %w[accessible-autocomplete conditional-filter] %>
+                                    "data-controller": %w[conditional-filter accessible-autocomplete] %>
 
       <%= f.hidden_field :page, value: "la-fallback" %>