Migrate vizio tests to use freezegun (#105417)

tests/components/vizio/test_media_player.py

@@ -6,6 +6,7 @@ from datetime import timedelta
 from typing import Any
 from unittest.mock import call, patch
 
+from freezegun import freeze_time
 import pytest
 from pyvizio.api.apps import AppConfig
 from pyvizio.const import (
@@ -472,7 +473,7 @@ async def _test_update_availability_switch(
     future_interval = timedelta(minutes=1)
 
     # Setup device as if time is right now
-    with patch("homeassistant.util.dt.utcnow", return_value=now):
+    with freeze_time(now):
         await _test_setup_speaker(hass, initial_power_state)
 
     # Clear captured logs so that only availability state changes are captured for
@@ -485,9 +486,7 @@ async def _test_update_availability_switch(
         with patch(
             "homeassistant.components.vizio.media_player.VizioAsync.get_power_state",
             return_value=final_power_state,
-        ), patch("homeassistant.util.dt.utcnow", return_value=future), patch(
-            "homeassistant.util.utcnow", return_value=future
-        ):
+        ), freeze_time(future):
             async_fire_time_changed(hass, future)
             await hass.async_block_till_done()
             if final_power_state is None: