title: android emulator does not play sound on bluetooth headphone in iMac
body: <p>bluetooth headphone connected to iMac(macOS Sierra v 10.12.2) and system audios could be heard from headphone.</p>
  
  <p>but Android Emulator audio not connect to headphone and play sound on iMac speaker.</p>
  
  <p>Even when the voice of the iMac is mute , Emulator sound could be heard from speaker.</p>