hal: route to speaker, when USB HS is unplugged

 When USB headset is disconnected the music platback paused
 and the policy manager send routing=0. If USB headset is
 connected before the standby time, AFE is not closed and opened,
 so routing to speker will guarantee AFE reconfiguration and
 AFE will be opend once USB is connected again, within standby
 time.

CRs-fixed: 2219129

Change-Id: I69985dda312de34e2c86c85ac448a722f7f31f42
3 files changed