Add async_safe annotation (#3688)

* Add async_safe annotation

* More async_run_job

* coroutine -> async_save

* Lint

* Rename async_safe -> callback

* Add tests to core for different job types

* Add one more test with different type of callbacks

* Fix typing signature for callback methods

* Fix callback service executed method

* Fix method signatures for callback

homeassistant/components/automation/time.py

@@ -4,11 +4,11 @@ Offer time listening automation rules.
 For more details about this automation rule, please refer to the documentation
 at https://home-assistant.io/components/automation/#time-trigger
 """
-import asyncio
 import logging
 
 import voluptuous as vol
 
+from homeassistant.core import callback
 from homeassistant.const import CONF_AFTER, CONF_PLATFORM
 from homeassistant.helpers import config_validation as cv
 from homeassistant.helpers.event import async_track_time_change
@@ -39,10 +39,10 @@ def async_trigger(hass, config, action):
         minutes = config.get(CONF_MINUTES)
         seconds = config.get(CONF_SECONDS)
 
-    @asyncio.coroutine
+    @callback
     def time_automation_listener(now):
         """Listen for time changes and calls action."""
-        hass.async_add_job(action, {
+        hass.async_run_job(action, {
             'trigger': {
                 'platform': 'time',
                 'now': now,