[mob]Fix refresh bug in all sections for people

mobile/lib/models/search/search_types.dart

@@ -6,6 +6,7 @@ import "package:photos/core/event_bus.dart";
 import "package:photos/events/collection_updated_event.dart";
 import "package:photos/events/event.dart";
 import "package:photos/events/location_tag_updated_event.dart";
+import "package:photos/events/people_changed_event.dart";
 import "package:photos/generated/l10n.dart";
 import "package:photos/models/collection/collection.dart";
 import "package:photos/models/collection/collection_items.dart";
@@ -279,6 +280,8 @@ extension SectionTypeExtensions on SectionType {
         return [Bus.instance.on<LocationTagUpdatedEvent>()];
       case SectionType.album:
         return [Bus.instance.on<CollectionUpdatedEvent>()];
+      case SectionType.face:
+        return [Bus.instance.on<PeopleChangedEvent>()];
       default:
         return [];
     }