[BUG] when adding an activity in harmony app, external accessory needs to be removed / added again
**Describe the bug**
when adding an activity in harmony app, external accessory needs to be removed / added again
otherwise, new activity will be seen outside of inputs, as a service.

**To Reproduce**
Add an activity in harmony ap and restart homebridge

**Expected behavior**
should be added to input list without need to remove

**IOS (please complete the following information):**
- Version 14.1

