Merge "Audio policy: fix crash in absence of spatializer" into sc-v2-dev

        media::GetSpatializerResponse* _aidl_return) {

    _aidl_return->spatializer = nullptr;

    LOG_ALWAYS_FATAL_IF(callback == nullptr);

    RETURN_IF_BINDER_ERROR(binderStatusFromStatusT(mSpatializer->registerCallback(callback)));

    if (mSpatializer != nullptr) {

        RETURN_IF_BINDER_ERROR(

                binderStatusFromStatusT(mSpatializer->registerCallback(callback)));

        _aidl_return->spatializer = mSpatializer;

    }

    return Status::ok();

}