Add account sensitized (#14361)

* Add account sensitized

* Fix i18n normalize

* Fix description and spec

* Fix spec

* Fix wording

app/serializers/activitypub/note_serializer.rb

@@ -95,6 +95,10 @@ class ActivityPub::NoteSerializer < ActivityPub::Serializer
     ActivityPub::TagManager.instance.cc(object)
   end
 
+  def sensitive
+    object.account.sensitized? || object.sensitive
+  end
+
   def virtual_tags
     object.active_mentions.to_a.sort_by(&:id) + object.tags + object.emojis
   end