Restructure device tracker (#23862)

* Restructure device tracker

* Docstyle

* Fix typing

* Lint

* Lint

* Fix tests

homeassistant/components/device_tracker/const.py

@@ -0,0 +1,40 @@
+"""Device tracker constants."""
+from datetime import timedelta
+import logging
+
+LOGGER = logging.getLogger(__package__)
+
+DOMAIN = 'device_tracker'
+ENTITY_ID_FORMAT = DOMAIN + '.{}'
+
+PLATFORM_TYPE_LEGACY = 'legacy'
+PLATFORM_TYPE_ENTITY = 'entity_platform'
+
+SOURCE_TYPE_GPS = 'gps'
+SOURCE_TYPE_ROUTER = 'router'
+SOURCE_TYPE_BLUETOOTH = 'bluetooth'
+SOURCE_TYPE_BLUETOOTH_LE = 'bluetooth_le'
+
+CONF_SCAN_INTERVAL = 'interval_seconds'
+SCAN_INTERVAL = timedelta(seconds=12)
+
+CONF_TRACK_NEW = 'track_new_devices'
+DEFAULT_TRACK_NEW = True
+
+CONF_AWAY_HIDE = 'hide_if_away'
+DEFAULT_AWAY_HIDE = False
+
+CONF_CONSIDER_HOME = 'consider_home'
+DEFAULT_CONSIDER_HOME = timedelta(seconds=180)
+
+CONF_NEW_DEVICE_DEFAULTS = 'new_device_defaults'
+
+ATTR_ATTRIBUTES = 'attributes'
+ATTR_BATTERY = 'battery'
+ATTR_DEV_ID = 'dev_id'
+ATTR_GPS = 'gps'
+ATTR_HOST_NAME = 'host_name'
+ATTR_LOCATION_NAME = 'location_name'
+ATTR_MAC = 'mac'
+ATTR_SOURCE_TYPE = 'source_type'
+ATTR_CONSIDER_HOME = 'consider_home'