Add type hints to async_setup_scanner (#63826)

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

homeassistant/components/ping/device_tracker.py

@@ -1,5 +1,8 @@
 """Tracks devices by sending a ICMP echo request (ping)."""
+from __future__ import annotations
+
 import asyncio
+from collections.abc import Awaitable, Callable
 from datetime import timedelta
 import logging
 import subprocess
@@ -15,8 +18,10 @@ from homeassistant.components.device_tracker.const import (
     SCAN_INTERVAL,
     SOURCE_TYPE_ROUTER,
 )
+from homeassistant.core import HomeAssistant
 import homeassistant.helpers.config_validation as cv
 from homeassistant.helpers.event import async_track_point_in_utc_time
+from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
 from homeassistant.util.async_ import gather_with_concurrency
 from homeassistant.util.process import kill_subprocess
 
@@ -77,7 +82,12 @@ class HostSubProcess:
         return False
 
 
-async def async_setup_scanner(hass, config, async_see, discovery_info=None):
+async def async_setup_scanner(
+    hass: HomeAssistant,
+    config: ConfigType,
+    async_see: Callable[..., Awaitable[None]],
+    discovery_info: DiscoveryInfoType | None = None,
+) -> None:
     """Set up the Host objects and return the update function."""
 
     privileged = hass.data[DOMAIN][PING_PRIVS]