Merge "audio policy: fix preferred device for mmap I/Os" into main

    if (active) {

        // On MMAP IOs, the preferred device is selected by the first client (virtual client

        // created when the mmap stream is opened). This client is never active.

        // created when the mmap stream is opened). This client is never active and we only

        // consider the Filter criteria, not the active state.

        // On non MMAP IOs, the preferred device is honored only if all active clients have

        // a preferred device in which case the first client drives the selection.

        if (desc->isMmap()) {

            // The client list is never empty on a MMAP IO

            return devices.getDeviceFromId(

                    desc->clientsList(false /*activeOnly*/)[0]->preferredDeviceId());

            auto matchingClients = desc->clientsList(

                    false /*activeOnly*/, filter, true /*preferredDevice*/);

            if (matchingClients.empty()) {

                return nullptr;

            }

            return devices.getDeviceFromId(matchingClients[0]->preferredDeviceId());

        } else {

            auto activeClientsWithRoute =

                desc->clientsList(true /*activeOnly*/, filter, true /*preferredDevice*/);