[automerger skipped] Spatializer: process callbacks in separate thread am:...

[automerger skipped] Spatializer: process callbacks in separate thread am: 8a4259fc am: 9d02ae8e -s ours

am skip reason: Merged-In I1342602259b147727c704ad7bbeb1b3a68c7b231 with SHA-1 bf8cead8 is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/av/+/15825352

Change-Id: I50eda5126ab70f7b73e977ee7512633aff3c3022