post proc : volume listener : fix effect release crash

Fix access to deleted effect context in vol_prc_lib_release()

Bug: 25753245.
Change-Id: I64ca99e4d5d09667be4c8c605f66700b9ae67949
(cherry picked from commit 93ab6fdda7b7557ccb34372670c30fa6178f8426)
1 file changed
tree: 166ec45e042560665ca67037c7a020b35e3bdf65
  1. Android.mk
  2. hal/
  3. legacy/
  4. post_proc/
  5. visualizer/
  6. voice_processing/