Merge "audiopolicy: fix routing of exclusive preferred device" into qt-dev

    outputDesc->setClientActive(client, true);

    if (client->hasPreferredDevice(true)) {

        if (outputDesc->clientsList(true /*activeOnly*/).size() == 1 &&

                client->isPreferredDeviceForExclusiveUse()) {

            // Preferred device may be exclusive, use only if no other active clients on this output

            devices = DeviceVector(

                        mAvailableOutputDevices.getDeviceFromId(client->preferredDeviceId()));

        } else {

            devices = getNewOutputDevices(outputDesc, false /*fromCache*/);

        }

        if (devices != outputDesc->devices()) {

            checkStrategyRoute(clientStrategy, outputDesc->mIoHandle);

        }