Fix withings wrong sleep state entry (#29651)

* Fixing issue where wrong sleep state entry was being used. closes #28370,#29397

* Fixing formatting.

* Sorting imports to get black checks to pass.

* Using lambda for getting latest sleep serie.

tests/components/withings/test_common.py

@@ -1,15 +1,14 @@
 """Tests for the Withings component."""
 from asynctest import MagicMock
-
 import pytest
 from withings_api import WithingsApi
-from withings_api.common import UnauthorizedException, TimeoutException
+from withings_api.common import TimeoutException, UnauthorizedException
 
-from homeassistant.exceptions import PlatformNotReady
 from homeassistant.components.withings.common import (
     NotAuthenticatedError,
     WithingsDataManager,
 )
+from homeassistant.exceptions import PlatformNotReady
 
 
 @pytest.fixture(name="withings_api")