fix serializer response

suitablephones/serializers.py

@@ -1,6 +1,6 @@
 from rest_framework import serializers
 
-from suitablephones.models import Bluetooth, Camera, Device
+from suitablephones.models import Bluetooth, Camera, Device, Screen
 
 
 class CameraSerializer(serializers.ModelSerializer):
@@ -22,6 +22,7 @@ class ScreenSerializer(serializers.ModelSerializer):
 class DeviceSerializer(serializers.ModelSerializer):
     bluetooth = BluetoothSerializer(many=False, read_only=True)
     cameras = CameraSerializer(many=True, read_only=True)
+    screen = ScreenSerializer(many=True, read_only=True)
 
     class Meta:
         model = Device