Merge "voice processing: support several sessions per input stream" into qt-dev

#include <dlfcn.h>

#include <unistd.h>

#include <cutils/log.h>

#include <log/log.h>

#include <cutils/list.h>

#include <hardware/audio_effect.h>

#include <audio_effects/effect_aec.h>

    list_for_each(node, &session_list) {

        session = node_to_item(node, struct session_s, node);

        if (session->io == ioId) {

        if (session->id == sessionId) {

            if (session->created_msk & (1 << id)) {

                ALOGV("get_session() effect %d already created", id);

                return NULL;