Merge change 8542 into donut

* changes:
  Integrate unsubmitted cupcake change 148895: 	CTS: add new testcases for android.media.AudioTrack
tree: b9b5e37e22804fdb9e01b42f7f7361f6b8cd44a6
  1. tests/
  2. tools/
  3. Android.mk