Revert "audio: use LOG instead of ALOG"

This reverts commit 8dfb7adec0201e4e4f466b20b80c3022c7be98dc.
Revert "audio: implement basic ALSA audio driver"

This reverts commit f48cd0d0885662e78de455fb4542db17f89c9a3f.
Revert "libaudio: remove nexus libaudio version"

This reverts commit f33a681d6e659587f410441d896f024492f96fea.