Add wemo 'Socket' model for Homekit discovery (#38765)

Corresponds with the model WSP080 WiFi Smart Plug
https://www.belkin.com/us/p/P-WSP080/

```
[homeassistant.components.zeroconf] Discovered new device Wemo Plug 603._hap._tcp.local. {'host': '10.234.200.95', 'port': 54664, 'hostname': 'Wemo Plug 603.local.', 'type': '_hap._tcp.local.', 'name': 'Wemo Plug 603._hap._tcp.local.', 'properties': {'_raw': {'c#': b'2', 'ff': b'2', 'id': b'63:30:B3:10:BA:B1', 'md': b'Socket', 'pv': b'1.1', 's#': b'1', 'sf': b'1', 'ci': b'7', 'sh': b'AD4l7g=='}, 'c#': '2', 'ff': '2', 'id': '63:30:B3:10:BA:B1', 'md': 'Socket', 'pv': '1.1', 's#' : '1', 'sf': '1', 'ci': '7', 'sh': 'AD4l7g=='}}
```

homeassistant/components/wemo/manifest.json

@@ -10,7 +10,7 @@
     }
   ],
   "homekit": {
-    "models": ["Wemo"]
+    "models": ["Socket", "Wemo"]
   },
   "codeowners": []
 }

homeassistant/generated/zeroconf.py

@@ -85,6 +85,7 @@ HOMEKIT = {
     "PowerView": "hunterdouglas_powerview",
     "Presence": "netatmo",
     "Rachio": "rachio",
+    "Socket": "wemo",
     "TRADFRI": "tradfri",
     "Welcome": "netatmo",
     "Wemo": "wemo",