Add unique id to ADS platforms (#20511)

* Add friendly_name option

* Correct hound findings

* correct hound findings 2

* add unique id

* add unique id to all ads platforms

homeassistant/components/ads/binary_sensor.py

@@ -44,6 +44,7 @@ class AdsBinarySensor(BinarySensorDevice):
     def __init__(self, ads_hub, name, ads_var, device_class):
         """Initialize ADS binary sensor."""
         self._name = name
+        self._unique_id = ads_var
         self._state = False
         self._device_class = device_class or 'moving'
         self._ads_hub = ads_hub
@@ -66,6 +67,11 @@ class AdsBinarySensor(BinarySensorDevice):
         """Return the default name of the binary sensor."""
         return self._name
 
+    @property
+    def unique_id(self):
+        """Return an unique identifier for this entity."""
+        return self._unique_id
+
     @property
     def device_class(self):
         """Return the device class."""