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. hal/
  2. legacy/
  3. post_proc/
  4. visualizer/
  5. voice_processing/
  6. Android.mk