volume listener: provide more debugging info when effect desc is null
am: e02448b3c3

Change-Id: Ia9fe6bab0f81120eed21c630edcaa4d74e5e5b2b
tree: 46336f4e7b10d47c82fc67c8a2fe703803c1dc06
  1. hal/
  2. legacy/
  3. post_proc/
  4. visualizer/
  5. voice_processing/
  6. Android.mk