TWSP-HFP: Not stop virtual call while the other TWS+ device is audio connected

To avoid both of SCO disconnected while one earbud disconnect SCO in below
scenario, HF service not call stopScoUsingVirtualVoiceCall if the other TWS+
device is audio connected.
1) DUT pair and connect with Both TWS+ earbus
2) make sure two earbus are in-ear state
3) Make a voip call from DUT
4) during the call procedure, put off one earbud

Change-Id: I709ba5ca86f27d467e508e324073ac2dce300d65
CRs-Fixed: 2354713
1 file changed