Merge "use sp<AudioEffect> instead of unique_ptr<AudioEffect>" am: 2b8b3f8f1e am: 5d1986329e

Original change: https://android-review.googlesource.com/c/platform/frameworks/av/+/1622460

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Idce15cba5bdd23f3a9ddcd2d2c265015ec1a7b30