TF-437 Store state change of mailbox in background/terminate

lib/features/push_notification/domain/state/store_mailbox_state_to_refresh_state.dart

@@ -0,0 +1,22 @@
+
+import 'package:core/presentation/state/failure.dart';
+import 'package:core/presentation/state/success.dart';
+
+class StoreMailboxStateToRefreshLoading extends UIState {}
+
+class StoreMailboxStateToRefreshSuccess extends UIState {
+
+  StoreMailboxStateToRefreshSuccess();
+
+  @override
+  List<Object> get props => [];
+}
+
+class StoreMailboxStateToRefreshFailure extends FeatureFailure {
+  final dynamic exception;
+
+  StoreMailboxStateToRefreshFailure(this.exception);
+
+  @override
+  List<Object> get props => [exception];
+}