Add new audio sources to support the A1026 recording configurations.

    AUDIO_SOURCE_VOICE_DOWNLINK = 3,

    AUDIO_SOURCE_VOICE_CALL = 4,

    AUDIO_SOURCE_CAMCORDER = 5,

    AUDIO_SOURCE_MAX = AUDIO_SOURCE_CAMCORDER,

    AUDIO_SOURCE_VOICE_RECOGNITION = 6,

    AUDIO_SOURCE_MAX = AUDIO_SOURCE_VOICE_RECOGNITION,

    AUDIO_SOURCE_LIST_END  // must be last - used to validate audio source type

};