Revert "audio:Avoid AudioTrackThread if Track creation fails"

This reverts commit b96f07930159ebbdcd44645ac62604ff6cbddfc7.

Change-Id: Iae20ed1c59a206450b3de18118b1b9c4a8a469c5
Merge branch 'cm-11.0' of https://github.com/CyanogenMod/android_frameworks_av into kitkat