Merge "aacdec: fix memory leak at onStop()" into sc-qpr1-dev am: bab3342b am: 7ac43805 am: ecd55e0e

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/av/+/15788848

Change-Id: Ic79c355e06eba7742b35b057550fdcfa9ff7da75