Merge "AudioFlinger: Close MMap threads in destructor"

        // closeOutput_nonvirtual() will remove specified entry from mPlaybackThreads

        closeOutput_nonvirtual(mPlaybackThreads.keyAt(0));

    }

    while (!mMmapThreads.isEmpty()) {

        const audio_io_handle_t io = mMmapThreads.keyAt(0);

        if (mMmapThreads.valueAt(0)->isOutput()) {

            closeOutput_nonvirtual(io); // removes entry from mMmapThreads

        } else {

            closeInput_nonvirtual(io);  // removes entry from mMmapThreads

        }

    }

    for (size_t i = 0; i < mAudioHwDevs.size(); i++) {

        // no mHardwareLock needed, as there are no other references to this