Add significant Change support for camera (#105866)

homeassistant/components/camera/significant_change.py

@@ -0,0 +1,22 @@
+"""Helper to test significant Camera state changes."""
+from __future__ import annotations
+
+from typing import Any
+
+from homeassistant.core import HomeAssistant, callback
+
+
+@callback
+def async_check_significant_change(
+    hass: HomeAssistant,
+    old_state: str,
+    old_attrs: dict,
+    new_state: str,
+    new_attrs: dict,
+    **kwargs: Any,
+) -> bool | None:
+    """Test if state significantly changed."""
+    if old_state != new_state:
+        return True
+
+    return None