BT-VR: Route audio over SCO for VR only on remote support

There are some carkits that doesn't support VR. The
BluetoothHandsfree doesn't check for remote device
feature support and sends +BVRA: 1 and then tries to
route the audio over SCO channel. The change is to
check for remote VR feature support before opening SCO.
Also, when stopVR is called we check for remote VR
feature support.

Change-Id: Ibc345184cf30d928ac30cc14d6763b707404a2d5
CRs-Fixed: 468587
Merge "BT-VR: Route audio over SCO for VR only on remote support"
Merge remote-tracking branch 'caf/jb_2.5' into cm-10.1