Bluetooth: Keep master role when SCO or eSCO is active

This improves compatbility with a lot of headset / chipset
combinations. Ideally this should not be needed.

Change-Id: I8b676701e12e416aa7d60801b9d353b15d102709
Signed-off-by: hyungseoung.yoo <hyungseoung.yoo@samsung.com>
Signed-off-by: Jaikumar Ganesh <jaikumarg@android.com>