Allow exposing any entity to the default conversation agent (#92398)

* Allow exposing any entity to the default conversation agent

* Tweak

* Fix race, update tests

* Update tests

tests/components/camera/test_recorder.py

@@ -3,6 +3,8 @@ from __future__ import annotations
 
 from datetime import timedelta
 
+import pytest
+
 from homeassistant.components import camera
 from homeassistant.components.recorder import Recorder
 from homeassistant.components.recorder.history import get_significant_states
@@ -20,9 +22,15 @@ from tests.common import async_fire_time_changed
 from tests.components.recorder.common import async_wait_recording_done
 
 
+@pytest.fixture(autouse=True)
+async def setup_homeassistant():
+    """Override the fixture in calendar.conftest."""
+
+
 async def test_exclude_attributes(recorder_mock: Recorder, hass: HomeAssistant) -> None:
     """Test camera registered attributes to be excluded."""
     now = dt_util.utcnow()
+    await async_setup_component(hass, "homeassistant", {})
     await async_setup_component(
         hass, camera.DOMAIN, {camera.DOMAIN: {"platform": "demo"}}
     )