Add missing property in flexit bacnet test (#108606)

Add missing property on mocked device

Also update the snapshot

tests/components/flexit_bacnet/conftest.py

@@ -59,6 +59,7 @@ def mock_flexit_bacnet() -> Generator[AsyncMock, None, None]:
         flexit_bacnet.air_filter_operating_time = 8820.0
         flexit_bacnet.heat_exchanger_efficiency = 81
         flexit_bacnet.heat_exchanger_speed = 100
+        flexit_bacnet.air_filter_polluted = False
 
         yield flexit_bacnet
 

tests/components/flexit_bacnet/snapshots/test_binary_sensor.ambr

@@ -40,6 +40,6 @@
     'entity_id': 'binary_sensor.device_name_air_filter_polluted',
     'last_changed': <ANY>,
     'last_updated': <ANY>,
-    'state': 'on',
+    'state': 'off',
   })
 # ---