hal: Add path for VR headset

 * Needed to keep Listen from derping.
 * Just point to regular headset device by default.

Change-Id: I64975c196fcb5f2b32d34d54ba01a0d73a90db4f
Merge branch 'cm-11.0' of https://github.com/CyanogenMod/android_hardware_qcom_audio-caf into cm-11.0