Fix pylint warnings in xiaomi tests (#119373)

tests/components/xiaomi/test_device_tracker.py

@@ -28,7 +28,7 @@ def mocked_requests(*args, **kwargs):
     class MockResponse:
         """Class to represent a mocked response."""
 
-        def __init__(self, json_data, status_code):
+        def __init__(self, json_data, status_code) -> None:
             """Initialize the mock response class."""
             self.json_data = json_data
             self.status_code = status_code
@@ -48,6 +48,7 @@ def mocked_requests(*args, **kwargs):
                 raise requests.HTTPError(self.status_code)
 
     data = kwargs.get("data")
+    # pylint: disable-next=global-statement
     global FIRST_CALL  # noqa: PLW0603
 
     if data and data.get("username", None) == INVALID_USERNAME: