Use SerializableResource on ActionController integration

On the ActionController was using a adapter, and since the instrumentation is
made on the SerializableResource we need to use the SerializableResource over
the adapter directly. Otherwise the logger is not called on a Rails app.

Use SerializableResource on the ActionController, since this is the main
interface to create and call a serializer.

Using always the SerializableResource we can keep the adapter code more easy to
mantain since no Adapter will need to call the instrumentation, only the
SerializableResource care about this.

lib/action_controller/serialization.rb

@@ -31,6 +31,7 @@ def get_serializer(resource, options = {})
         serializable_resource.serialization_scope_name = _serialization_scope
         begin
           serializable_resource.adapter
+          serializable_resource
         rescue ActiveModel::Serializer::CollectionSerializer::NoSerializerError
           resource
         end

test/action_controller/serialization_test.rb

@@ -420,6 +420,16 @@ def use_adapter?
           controller.get_serializer(Profile.new)
         end)
       end
+
+      def test_render_event_is_emmited
+        ActiveSupport::Notifications.subscribe('render.active_model_serializers') do |name|
+          @name = name
+        end
+
+        get :render_using_implicit_serializer
+
+        assert_equal 'render.active_model_serializers', @name
+      end
     end
   end
 end