Revert "dlx: Disable audio features that aren't yet supported"

This seems to build correctly now.

This reverts commit d365c0b5ae6633856737aac528f97d3259b67828.

Change-Id: I535471ed7337147249bb12d135dab26e80657f87
Merge branch 'cm-12.0' of https://github.com/CyanogenMod/android_device_htc_dlx into lollipop