OwnTracks Config Entry (#18759)

* OwnTracks Config Entry

* Fix test

* Fix headers

* Lint

* Username for android only

* Update translations

* Tweak translation

* Create config entry if not there

* Update reqs

* Types

* Lint

homeassistant/setup.py

@@ -4,7 +4,7 @@ import logging.handlers
 from timeit import default_timer as timer
 
 from types import ModuleType
-from typing import Optional, Dict, List
+from typing import Awaitable, Callable, Optional, Dict, List
 
 from homeassistant import requirements, core, loader, config as conf_util
 from homeassistant.config import async_notify_setup_error
@@ -248,3 +248,35 @@ async def async_process_deps_reqs(
             raise HomeAssistantError("Could not install all requirements.")
 
     processed.add(name)
+
+
+@core.callback
+def async_when_setup(
+        hass: core.HomeAssistant, component: str,
+        when_setup_cb: Callable[
+            [core.HomeAssistant, str], Awaitable[None]]) -> None:
+    """Call a method when a component is setup."""
+    async def when_setup() -> None:
+        """Call the callback."""
+        try:
+            await when_setup_cb(hass, component)
+        except Exception:  # pylint: disable=broad-except
+            _LOGGER.exception('Error handling when_setup callback for %s',
+                              component)
+
+    # Running it in a new task so that it always runs after
+    if component in hass.config.components:
+        hass.async_create_task(when_setup())
+        return
+
+    unsub = None
+
+    async def loaded_event(event: core.Event) -> None:
+        """Call the callback."""
+        if event.data[ATTR_COMPONENT] != component:
+            return
+
+        unsub()  # type: ignore
+        await when_setup()
+
+    unsub = hass.bus.async_listen(EVENT_COMPONENT_LOADED, loaded_event)