Berlin (dpa) — We’ve all wanted to play someone a song over headphones and then wished we could listen to it with them at the same time. Sharing one set of headphones can be tricky, if not impossible, but thankfully Bluetooth now makes it easier to use two headphones on one device. Some Android smartphones offer a handy feature called “Dual Audio” that allows you to connect two Bluetooth headphones to your device at the same time and play the same audio source on both headphones. You can see whether your device supports this feature in the device settings under the Connections or Bluetooth sec…