Improve supported module checks for hub children (#1188)

No devices in `fixtures/smart/child` support the `get_device_time` or
`get_device_usage` methods so this PR tests for whether the device is a
hub child and marks those modules/methods as not supported. This
prevents features being erroneously created on child devices.

It also moves the logic for getting the time from the parent module
behind getting it from the child module which was masking the creation
of these unsupported modules.

kasa/smart/modules/devicemodule.py

@@ -23,7 +23,8 @@ class DeviceModule(SmartModule):
             "get_device_info": None,
         }
         # Device usage is not available on older firmware versions
-        if self.supported_version >= 2:
+        # or child devices of hubs
+        if self.supported_version >= 2 and not self._device._is_hub_child:
             query["get_device_usage"] = None
 
         return query

kasa/smart/modules/time.py

@@ -83,3 +83,12 @@ class Time(SmartModule, TimeInterface):
             if region:
                 params["region"] = region
         return await self.call("set_device_time", params)
+
+    async def _check_supported(self):
+        """Additional check to see if the module is supported by the device.
+
+        Hub attached sensors report the time module but do return device time.
+        """
+        if self._device._is_hub_child:
+            return False
+        return await super()._check_supported()