hfp: Report SCO sample rate via g_sco_samplerate audio param if needed

On Samsung devices, we need to tell Audio HAL if we're running narrow
band or wide band.

Change-Id: Ibfa0f632d9acbb920a85a613ce4e2f1d26556bd1
Signed-off-by: SamarV-121 <samarvispute121@pm.me>