device_nokia_DPL_sprout/configs/media/media_codecs_google_telephony.xml

<?xml version="1.0" encoding="utf-8" ?>
<!-- Copyright (C) 2014 The Android Open Source Project

     Licensed under the Apache License, Version 2.0 (the "License");
     you may not use this file except in compliance with the License.
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     distributed under the License is distributed on an "AS IS" BASIS,
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<Included>
    <Decoders>
        <MediaCodec name="OMX.google.gsm.decoder" type="audio/gsm">
            <Limit name="channel-count" max="1" />
            <Limit name="sample-rate" ranges="8000" />
            <Limit name="bitrate" range="13000" />
        </MediaCodec>
    </Decoders>
</Included>