Revert "get BluetoothManager to ask about bt headset (KK implementation)"

This reverts commit 9d8a72b1a40572b313e0907d849c825b477c84d1.
Revert "reset the audio volume stream after switching audio mode"

This reverts commit a560e98764c82855bf2cd4494774a01dc3746cbd.
Revert "Port incall volume workaround to cm11 - q"

This reverts commit 62c586fe759fac023ff27cb8f123defb08fb27c5.