stereo call recording support

Change-Id: I934c252283d1346f9c1f6cf786ce2f661f20a049

Signed-off-by: flar2 <asegaert@gmail.com>
ALSA: jack: Add support to report second microphone

ALSA jack framework currently supports reporting only
one microphone. Add support to report presence of
second microphone to the userspace.

Signed-off-by: Phani Kumar Uppalapati <phaniu@codeaurora.org>
Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>