Camera turns on periodically
**Describe the bug**

The camera periodically begins capturing a stream, without any manual or automated trigger, and the streaming switch does not indicate that it is on.

**To Reproduce**

Steps to reproduce the behavior:

Unknown, happens periodically

**Expected behavior**

Only enable stream when manually chosen or automation triggers

Please answer these questions before submitting this issue:
```
On what OS are you running homebridge: Raspbian GNU/Linux Buster (10)
On what iOS version are you having issues: 14.0beta
What camera types are having issues: Indoor
Does this issue occur consistently or randomly: consistently 
If applicable, what was the last version that worked properly: n/a 
```

Logs:
```
[8/18/2020, 08:35:23] [Nest-cam] Setting Living Room to on # unknown trigger
[8/18/2020, 08:35:23] [Nest-cam] Setting Living Room to on # my intervention b/c the switch did not show on, but the camera was on
[8/18/2020, 08:35:28] [Nest-cam] Setting Living Room to off # me turning the camera off
[8/18/2020, 08:35:28] [Nest-cam] Setting Living Room to off # ?
```