Use http status constants more, add HTTP_ACCEPTED and HTTP_BAD_GATEWAY (#39993)

* Use http status codes and add HTTP_BAD_GATEWAY constant

* Address review comments:
 - using constants in tado integration
 - using constant in media_player init.py

* Add and use HTTP_ACCEPTED constant

homeassistant/components/tomato/device_tracker.py

@@ -19,6 +19,7 @@ from homeassistant.const import (
     CONF_USERNAME,
     CONF_VERIFY_SSL,
     HTTP_OK,
+    HTTP_UNAUTHORIZED,
 )
 import homeassistant.helpers.config_validation as cv
 
@@ -111,7 +112,7 @@ class TomatoDeviceScanner(DeviceScanner):
                         self.last_results[param] = json.loads(value.replace("'", '"'))
                 return True
 
-            if response.status_code == 401:
+            if response.status_code == HTTP_UNAUTHORIZED:
                 # Authentication error
                 _LOGGER.exception(
                     "Failed to authenticate, please check your username and password"