Add type hints to get_scanner/async_get_scanner (#63836)

Co-authored-by: epenet <epenet@users.noreply.github.com>

homeassistant/components/cppm_tracker/device_tracker.py

@@ -1,4 +1,6 @@
 """Support for ClearPass Policy Manager."""
+from __future__ import annotations
+
 from datetime import timedelta
 import logging
 
@@ -11,7 +13,9 @@ from homeassistant.components.device_tracker import (
     DeviceScanner,
 )
 from homeassistant.const import CONF_API_KEY, CONF_CLIENT_ID, CONF_HOST
+from homeassistant.core import HomeAssistant
 import homeassistant.helpers.config_validation as cv
+from homeassistant.helpers.typing import ConfigType
 
 SCAN_INTERVAL = timedelta(seconds=120)
 
@@ -28,7 +32,7 @@ PLATFORM_SCHEMA = PARENT_PLATFORM_SCHEMA.extend(
 _LOGGER = logging.getLogger(__name__)
 
 
-def get_scanner(hass, config):
+def get_scanner(hass: HomeAssistant, config: ConfigType) -> DeviceScanner | None:
     """Initialize Scanner."""
 
     data = {