Add distance to SensorDeviceClass (#77951)

* Add distance to SensorDeviceClass

* Adjust recorder

* Adjust tests

* Adjust recorder

* Update __init__.py

* Update test_websocket_api.py

* Update test_websocket_api.py

* Update test_websocket_api.py

* Update strings.json

* Fix tests

* Adjust docstring

homeassistant/components/sensor/device_trigger.py

@@ -35,6 +35,7 @@ CONF_BATTERY_LEVEL = "battery_level"
 CONF_CO = "carbon_monoxide"
 CONF_CO2 = "carbon_dioxide"
 CONF_CURRENT = "current"
+CONF_DISTANCE = "distance"
 CONF_ENERGY = "energy"
 CONF_FREQUENCY = "frequency"
 CONF_GAS = "gas"
@@ -65,6 +66,7 @@ ENTITY_TRIGGERS = {
     SensorDeviceClass.CO: [{CONF_TYPE: CONF_CO}],
     SensorDeviceClass.CO2: [{CONF_TYPE: CONF_CO2}],
     SensorDeviceClass.CURRENT: [{CONF_TYPE: CONF_CURRENT}],
+    SensorDeviceClass.DISTANCE: [{CONF_TYPE: CONF_DISTANCE}],
     SensorDeviceClass.ENERGY: [{CONF_TYPE: CONF_ENERGY}],
     SensorDeviceClass.FREQUENCY: [{CONF_TYPE: CONF_FREQUENCY}],
     SensorDeviceClass.GAS: [{CONF_TYPE: CONF_GAS}],
@@ -104,6 +106,7 @@ TRIGGER_SCHEMA = vol.All(
                     CONF_CO,
                     CONF_CO2,
                     CONF_CURRENT,
+                    CONF_DISTANCE,
                     CONF_ENERGY,
                     CONF_FREQUENCY,
                     CONF_GAS,