Split googlehome to a component with device tracker platform (#19971)

* Add component for googlehome

* Add missing name in CODEOWNERS

* Linting issues

* googledevices version bump

* Use NAME from component instead of DOMAIN

* Cleaner handling of accepted devices in for loop

* Fixes one linting issue

* Validate device_types

* Fixes one linting issue

* Fixes linting issue

* Revert 0abb642 and import DOMAIN as GOOGLEHOME_DOMAIN

* Return false if discovery_info is None

* Combine if's in for loop

* Use async_load_platfrom

* Fix line length

* Add error message to user

* Shorter log message

* error -> warning, remove period

* Update .coveragerc

* Move to correct place

CODEOWNERS

@@ -62,7 +62,6 @@ homeassistant/components/cover/group.py @cdce8p
 homeassistant/components/cover/template.py @PhracturedBlue
 homeassistant/components/device_tracker/asuswrt.py @kennedyshead
 homeassistant/components/device_tracker/automatic.py @armills
-homeassistant/components/device_tracker/googlehome.py @ludeeus
 homeassistant/components/device_tracker/huawei_router.py @abmantis
 homeassistant/components/device_tracker/quantum_gateway.py @cisasteelersfan
 homeassistant/components/device_tracker/tile.py @bachya
@@ -188,6 +187,10 @@ homeassistant/components/eight_sleep.py @mezz64
 homeassistant/components/*/eight_sleep.py @mezz64
 homeassistant/components/esphome/*.py @OttoWinter
 
+# G
+homeassistant/components/googlehome.py @ludeeus
+homeassistant/components/*/googlehome.py @ludeeus
+
 # H
 homeassistant/components/hive.py @Rendili @KJonline
 homeassistant/components/*/hive.py @Rendili @KJonline