Adding headers and test to support the Android Audio HAL

Headers originally from AOSP 4.2.2_r1.2, changed to have the correct
include path from other files provided by libhybris.

Signed-off-by: Ricardo Salveti de Araujo <ricardo.salveti@canonical.com>
hooks.c: no need to map strcasestr

Glibc implementation has a different behavior (e.g mako's android audio
HAL fails to parse alsa ucm file), and mapping is not needed.

Signed-off-by: Ricardo Salveti de Araujo <ricardo.salveti@canonical.com>
Merge pull request #78 from rsalveti/audio-hal

Audio HAL