AudioFlinger: delete Track object when createTrack() fails due to lack of tracks in AudioMixer.
AudioFlinger: delete Track object when createTrack() fails due to lack of tracks in AudioMixer.

This problem was encountered as a side effect of issue 2245298.

xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base