libhardware: Modify ifdefs for legacy DirectTrack

Change-Id: Id3a8adc3bd3b8fe5973e359b5268671f6fd26cd4

Conflicts:
	include/hardware/audio.h
Revert "libhardware: Modify ifdefs for legacy DirectTrack"

This reverts commit 0e043b9c55e800d40fcc3fd996bb4e8bf0706487.
libhardware: QCOMs revenge

Based on CAF kk_2.7_rb1.9

Change-Id: Ide64ea08b22cb147b9eee7afab438ea12ff59904

Conflicts:
	include/hardware/audio.h