Final clean up of helpers accessed via hass (#72032)

* Final clean up of helpers accessed via hass

* Fix circular dep

* Fix import

homeassistant/helpers/device_registry.py

@@ -420,6 +420,10 @@ class DeviceRegistry:
         via_device_id: str | None | UndefinedType = UNDEFINED,
     ) -> DeviceEntry | None:
         """Update device attributes."""
+        # Circular dep
+        # pylint: disable=import-outside-toplevel
+        from . import area_registry as ar
+
         old = self.devices[device_id]
 
         new_values: dict[str, Any] = {}  # Dict with new key/value pairs
@@ -442,13 +446,13 @@ class DeviceRegistry:
             disabled_by = DeviceEntryDisabler(disabled_by)
 
         if (
-            suggested_area not in (UNDEFINED, None, "")
+            suggested_area is not None
+            and suggested_area is not UNDEFINED
+            and suggested_area != ""
             and area_id is UNDEFINED
             and old.area_id is None
         ):
-            area = self.hass.helpers.area_registry.async_get(
-                self.hass
-            ).async_get_or_create(suggested_area)
+            area = ar.async_get(self.hass).async_get_or_create(suggested_area)
             area_id = area.id
 
         if (