Support all ActivityPub actor types (#6997)

Fix #6973

app/services/activitypub/fetch_remote_account_service.rb

@@ -3,6 +3,8 @@
 class ActivityPub::FetchRemoteAccountService < BaseService
   include JsonLdHelper
 
+  SUPPORTED_TYPES = %w(Application Group Organization Person Service).freeze
+
   # Should be called when uri has already been checked for locality
   # Does a WebFinger roundtrip on each call
   def call(uri, id: true, prefetched_body: nil)
@@ -54,6 +56,6 @@ class ActivityPub::FetchRemoteAccountService < BaseService
   end
 
   def expected_type?
-    @json['type'] == 'Person'
+    SUPPORTED_TYPES.include?(@json['type'])
   end
 end