Add modules to `ember_cli/ember` controller
Add modules to `ember_cli/ember` controller

Closes [#480].

When the `ApplicationController` extends `ActionController::API`, HTML
rendering modules and logic are omitted.

To make the `EmberCli::EmberController` capable of rendering the Ember
application's HTML, this commit ensures those modules are included when
necessary.

[#480]: https://github.com/thoughtbot/ember-cli-rails/issues/480

weggesser/ember-cli-rails,thoughtbot/ember-cli-rails,rwz/ember-cli-rails,rwz/ember-cli-rails,koryteg/glimmer-rails,weggesser/ember-cli-rails,weggesser/ember-cli-rails,rwz/ember-cli-rails,seanpdoyle/ember-cli-rails,thoughtbot/ember-cli-rails,seanpdoyle/ember-cli-rails,koryteg/glimmer-rails,koryteg/glimmer-rails,seanpdoyle/ember-cli-rails,thoughtbot/ember-cli-rails