Fix Android TV icon when screencap option is disabled (#35710)

* Don't return a media image hash if the screencap config option is False

* 1-liner

homeassistant/components/androidtv/media_player.py

@@ -452,6 +452,11 @@ def device_state_attributes(self):
         """Provide the last ADB command's response as an attribute."""
         return {"adb_response": self._adb_response}
 
+    @property
+    def media_image_hash(self):
+        """Hash value for media image."""
+        return f"{datetime.now().timestamp()}" if self._screencap else None
+
     @property
     def name(self):
         """Return the device name."""
@@ -497,11 +502,6 @@ def get_raw_media_data(self):
         """Raw image data."""
         return self.aftv.adb_screencap()
 
-    @property
-    def media_image_hash(self):
-        """Hash value for media image."""
-        return f"{datetime.now().timestamp()}"
-
     @adb_decorator()
     def media_play(self):
         """Send play command."""