BUGFIX: handle extra fan speeds. (#18799)

* BUGFIX: add support for extra fan speeds.

* Drop extra fan speeds.

Remove catch all, drop missing fan speeds.

* fix self.speed_synonyms call. Remove un-needed keys() call

homeassistant/components/google_assistant/trait.py

@@ -715,6 +715,8 @@ class FanSpeedTrait(_Trait):
         modes = self.state.attributes.get(fan.ATTR_SPEED_LIST, [])
         speeds = []
         for mode in modes:
+            if mode not in self.speed_synonyms:
+                continue
             speed = {
                 "speed_name": mode,
                 "speed_values": [{