Merge "AudioPolicy: Fix UAF of a temporary DeviceVector"

    if (streams.empty()) {

        streams.push_back(AUDIO_STREAM_MUSIC);

    }

    if (!devices().isEmpty()) {

        // Assume first device to check upon Gain Crontroller availability

    for (const auto& devicePort : devices()) {

        // APM loops on all group, so filter on active group to set the port gain,

        // let the other groups set the stream volume as per legacy

        const auto &devicePort = devices().itemAt(0);

        if (devicePort->hasGainController(true) && isActive(vs)) {

        // TODO: Pass in the device address and check against it.

        if (device == devicePort->type() &&

                devicePort->hasGainController(true) && isActive(vs)) {

            ALOGV("%s: device %s has gain controller", __func__, devicePort->toString().c_str());

            // @todo: here we might be in trouble if the SwOutput has several active clients with

            // different Volume Source (or if we allow several curves within same volume group)