Fix capability_attributes when supported_features is None (#30993)

* Fix capability_attributes when supported_features is None (water_heater)

* Fix capability_attributes when supported_features is None (media_player)

homeassistant/components/media_player/__init__.py

@@ -785,7 +785,7 @@ class MediaPlayerDevice(Entity):
     @property
     def capability_attributes(self):
         """Return capabilitiy attributes."""
-        supported_features = self.supported_features
+        supported_features = self.supported_features or 0
         data = {}
 
         if supported_features & SUPPORT_SELECT_SOURCE:

homeassistant/components/water_heater/__init__.py

@@ -146,7 +146,7 @@ class WaterHeaterDevice(Entity):
     @property
     def capability_attributes(self):
         """Return capabilitiy attributes."""
-        supported_features = self.supported_features
+        supported_features = self.supported_features or 0
 
         data = {
             ATTR_MIN_TEMP: show_temp(