Connections not terminated on stream end
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**Describe The Problem:**
<!-- A clear and concise description of what the issue is. -->
Incoming (receive) bandwidth from Protect to HomeBridge increases constantly after viewing camera streams.

I notice that throughout the course of the day, if viewing the stream on my phone or apple tv 4k (acting as the home hub, wired @ 1G) several times, the received network activity reported in homebridge begins to increase, as does the traffic out and CPU from the UDM.  My suspicion is that multiple RTSP streams are initiated, once each time I view the stream via the home app, but that there is an issue in disconnecting / terminating the stream.

You can see in the attached screenshots, one from the UDM-SE showing packets out, one from my ESXi host showing packets received on the associated docker VM.  The sharp drop off at approx 10:20pm 7/13 is when I restarted the homebridge-unifi-protect child hub.  Form ost of the ~1 hour before restarting it, I was not viewing the live stream and no motion was recorded or detected.  Note that is approximately 125Mbps

From Discord:  *ianiv — Today at 2:51 PM*
> Using nettop I can see that the node process does keep opening connections to the unvr and doesn’t close them. The more streams you watch and close the more connections get created that never go away and keep transferring data

**To Reproduce:**
<!-- Steps to reproduce the behavior. -->
1. View camera Live stream in Home app
2. Stop viewing (close app / minimize)
3. View another stream
4. Stop viewing

**Logs:**
<!-- In order to be helpful, include the relevant logs from Homebridge, if applicable. -->
I did not notice any applicable errors in the logs.  It appears as though the plugin indicates that streams are successfully torn down.

```
[7/14/2022, 10:57:50 PM] Homebridge v1.5.0 (HAP v0.10.2) (homebridge-unifi-protect) is running on port 30360.
[7/14/2022, 10:58:05 PM] [homebridge-unifi-protect] UDM SE [UDM-PRO-SE]: Connected to the UniFi Protect controller API (address: 10.1.1.1 mac: D021F9D972BB).
[7/14/2022, 10:58:05 PM] [homebridge-unifi-protect] UDM SE [UDM-PRO-SE]: Connected to the UniFi Protect realtime update events API.
[7/14/2022, 10:58:05 PM] [homebridge-unifi-protect] UDM SE [UDM-PRO-SE]: Discovered camera: G4 Instant [UVC G4 Instant] (address: 10.10.2.51 mac: D021F99244B7).
[7/14/2022, 10:58:05 PM] [homebridge-unifi-protect] UDM SE [UDM-PRO-SE]: Controller refresh interval set to 15 seconds.
[7/14/2022, 10:58:05 PM] [homebridge-unifi-protect] UDM SE [UDM-PRO-SE] G4 Instant [UVC G4 Instant]: HomeKit Secure Video support enabled.
[7/14/2022, 10:58:05 PM] [homebridge-unifi-protect] UDM SE [UDM-PRO-SE] G4 Instant [UVC G4 Instant]: HomeKit Secure Video event recording enabled: 2688x1512@30fps (High), 2000 kbps with a 4 second timeshift buffer.
[7/15/2022, 12:07:26 AM] [Homebridge UI] Running scheduled instance backup...
[7/15/2022, 12:07:26 AM] [Homebridge UI] Creating temporary backup archive at /tmp/homebridge-backup-F8iJ3A/homebridge-backup-0EAA910AF17E.tar.gz
[7/15/2022, 1:10:35 AM] [Homebridge UI] Running job to cleanup config.json backup files older than 60 days...
[7/15/2022, 5:53:06 AM] [homebridge-unifi-protect] UDM SE [UDM-PRO-SE] G4 Instant [UVC G4 Instant]: HomeKit Secure Video has recorded a 19 second motion event.
[7/15/2022, 5:54:00 AM] [homebridge-unifi-protect] UDM SE [UDM-PRO-SE] G4 Instant [UVC G4 Instant]: Streaming request from 10.1.1.85: 1280x720@30fps, 299 kbps. Using 1280x720@30fps (Medium), 1500 kbps.
[7/15/2022, 5:54:03 AM] [homebridge-unifi-protect] UDM SE [UDM-PRO-SE] G4 Instant [UVC G4 Instant]: Stopped video streaming session.
[7/15/2022, 6:10:06 AM] [homebridge-unifi-protect] UDM SE [UDM-PRO-SE] G4 Instant [UVC G4 Instant]: Streaming request from 10.1.1.85: 1280x720@30fps, 299 kbps. Using 1280x720@30fps (Medium), 1500 kbps.
[7/15/2022, 6:10:08 AM] [homebridge-unifi-protect] UDM SE [UDM-PRO-SE] G4 Instant [UVC G4 Instant]: Stopped video streaming session.
[7/15/2022, 6:10:59 AM] [homebridge-unifi-protect] UDM SE [UDM-PRO-SE] G4 Instant [UVC G4 Instant]: Streaming request from 10.1.1.85: 1280x720@30fps, 299 kbps. Using 1280x720@30fps (Medium), 1500 kbps.
[7/15/2022, 6:11:10 AM] [homebridge-unifi-protect] UDM SE [UDM-PRO-SE] G4 Instant [UVC G4 Instant]: Stopped video streaming session.
```

**Homebridge Configuration:**

```json
{
    "bridge": {
        "name": "Homebridge",
        "username": "",
        "port": ,
        "pin": "",
        "advertiser": "bonjour-hap"
    },
    "accessories": [],
    "platforms": [
        {
            "name": "Config",
            "port": 8581,
            "auth": "form",
            "theme": "dark-mode",
            "tempUnits": "c",
            "lang": "auto",
            "platform": "config"
        },
        {
            "controllers": [
                {
                    "address": "10.10.2.1",
                    "password": "",
                    "refreshInterval": 15,
                    "username": "api-homebridge"
                }
            ],
            "options": [
                "Enable.Log.Motion"
            ],
            "_bridge": {
                "username": "",
                "port": 
            },
            "platform": "UniFi Protect"
        }
    ]
}
```

**Screenshots:**
<!-- If applicable, add screenshots to help explain your problem. -->
![unknown](https://user-images.githubusercontent.com/33871202/179294722-f29fcbc3-cefd-4817-9492-621a961723d6.png)
![unknown](https://user-images.githubusercontent.com/33871202/179294700-4d3afd11-069b-4282-917d-ae9fcdbc45e2.png)

**Environment:**

* **Homebridge Version:** 1.5.0<!-- homebridge -V -->
* **Node Version:** v16.16.0<!-- node -v -->
* **Homebridge-UniFi-Protect Plugin Version:** v5.5.4
* **UniFi Protect Version:** Protect 2.1.1<!-- Read the Protect version line from https://unifi-controller/protect/settings -->
* **UniFi Protect Controller Type:** UDM-SE <!-- UCKgen2+, UDMP, UNVR, etc. -->
* **UniFi Protect Controller Firmware Version:** Protect 2.1.1 
* **Apple Device and iOS / macOS / iPadOS / tvOS Version:** 
  * AppleTV 4k - tvOS 15.5.1
  * iPhone 12 Mini - iOS 15.5
* **Operating System and OS Version:** 
  * CentOS Linux release 7.9.2009 (Core)
  * Docker version 20.10.15, build fd82621


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