Add Royal Gardineer BLE devices with gateway

This battery water valve is functioning with tuya-local and a Wifi
gateway. Make it autoconfigurable.

custom_components/tuya_local/devices/ble_water_valve.yaml

@@ -7,6 +7,8 @@ products:
     name: Diivoo Water Timer Valve WT-03
   - id: nxquc5lb
     model: SOP10
+  - id: so5ybnw9
+    name: BWC-495.bt Royal Gardineer
 primary_entity:
   entity: switch
   icon: "mdi:pipe-valve"