Add system health check to Spotify (#43249)

.coveragerc

@@ -832,6 +832,7 @@ omit =
     homeassistant/components/spotcrime/sensor.py
     homeassistant/components/spotify/__init__.py
     homeassistant/components/spotify/media_player.py
+    homeassistant/components/spotify/system_health.py
     homeassistant/components/squeezebox/__init__.py
     homeassistant/components/squeezebox/browse_media.py
     homeassistant/components/squeezebox/media_player.py

homeassistant/components/spotify/strings.json

@@ -16,5 +16,10 @@
       "reauth_account_mismatch": "The Spotify account authenticated with, does not match the account needed re-authentication."
     },
     "create_entry": { "default": "Successfully authenticated with Spotify." }
+  },
+  "system_health": {
+    "info": {
+      "api_endpoint_reachable": "Spotify API endpoint reachable"
+    }
   }
 }

homeassistant/components/spotify/system_health.py

@@ -0,0 +1,20 @@
+"""Provide info to system health."""
+from homeassistant.components import system_health
+from homeassistant.core import HomeAssistant, callback
+
+
+@callback
+def async_register(
+    hass: HomeAssistant, register: system_health.SystemHealthRegistration
+) -> None:
+    """Register system health callbacks."""
+    register.async_register_info(system_health_info)
+
+
+async def system_health_info(hass):
+    """Get info for the info page."""
+    return {
+        "api_endpoint_reachable": system_health.async_check_can_reach_url(
+            hass, "https://api.spotify.com"
+        )
+    }