initial audio HAL implementation for mako

alsa_sound is imported from codeaurora at:

c1217338f349fe746e0933fcf9b1b288b532808d

[remote "quic"]
        url = git://git-android.quicinc.com/platform/hardware/alsa_sound.git


        review = review-android.quicinc.com
        projectname = platform/hardware/alsa_sound
        fetch = +refs/heads/*:refs/remotes/quic/*

Change-Id: Ic985cc3a1088c3957b6e2ac5537e2c36caaf7212
Signed-off-by: Iliyan Malchev <malchev@google.com>