Nest Hello Notify Through Homepod
I'm trying to select the toggles to output the doorbell chime through HomePods, but they will not flip.

Steps to reproduce the behavior:

1. Go into the Home App
2. Select doorbell cam
3. Tap the gear icon in the video feed
4. Tap Notifications
5. Tap Chime on HomePod
6. Toggle one of the switches to your HomePods.

**Expected behavior**
The switch(es) should toggle allowing the chime to go through the HomePod.

Please answer these questions before submitting this issue:
```
On what OS are you running homebridge: macOS Catalina
On what iOS version are you having issues: iOS 14
What camera types are having issues: Nest Hello
Does this issue occur consistently or randomly: Consistently
If applicable, what was the last version that worked properly: N/A
```
