audio: Update NS for functions from h/i/audio/aidl/common/include/Utils.h

These utility functions got moved into 'aidl' namespace,
update code that uses them.

Along the way reorganized lists of includes to match the
style guide.

Bug: 205884982
Test: m
Change-Id: I541e45b9cdb6c85711e53bd8c0cd10a60160bcc5