Possible device type targeting options.

DEVICE_TYPE_UNSPECIFIED Default value when device type is not specified in this version. This enum is a placeholder for default value and does not represent a real device type option.
DEVICE_TYPE_COMPUTER The device type is computer.
DEVICE_TYPE_CONNECTED_TV The device type is connected TV.
DEVICE_TYPE_SMART_PHONE The device type is smart phone..
DEVICE_TYPE_TABLET The device type is tablet.