Implement new "Advanced Linux Sound Architecture" (ALSA) Audio Sink

[rjhowell44]

First Audio Only Sink to be implemented with the following services

/**
 * @brief Creates a new, uniquely named ALSA Sink that streams to a ALSA compatible
 * device.
 * @param[in] name unique component name for the new ALSA Sink
 * @param[in] device_location device-location setting for the ALSA Sink. Set value 
 * to "default" to use default sound device.
 * @return DSL_RESULT_SUCCESS on success, DSL_RESULT_SINK_RESULT otherwise
 */
DslReturnType dsl_sink_alsa_new(const wchar_t* name, 
    const wchar_t* device_location);

/**
 * @brief Gets the device location setting for the named ALSA Sink.
 * @param[in] name unique name of the ALSA Sink to query.
 * @param[out] device_location current device location setting. Default value is 
 * set to "default" for the default sound device.
 * @return DSL_RESULT_SUCCESS on success, DSL_RESULT_SINK_RESULT otherwise.
 */
DslReturnType dsl_sink_alsa_device_location_get(const wchar_t* name,
    const wchar_t** device_location);
    
/**
 * @brief Sets the device location setting for the named ALSA Sink. 
 * @param[in] name unique name of the ALSA Sink to update.
 * @param[in] device_location new device location setting to use. Set value 
 * to "default" to use default sound device.
 * @return DSL_RESULT_SUCCESS on success, DSL_RESULT_SINK_RESULT otherwise.
 */
DslReturnType dsl_sink_alsa_device_location_set(const wchar_t* name,
    const wchar_t* device_location);
    
/**
 * @brief Gets the device name setting for the named ALSA Sink.
 * @param[in] name unique name of the ALSA Sink to query.
 * @param[out] device_name current device name setting. 
 * Default = "". Updated after negotiation with the ALSA Device.
 * @return DSL_RESULT_SUCCESS on success, DSL_RESULT_SINK_RESULT otherwise.
 */
DslReturnType dsl_sink_alsa_device_name_get(const wchar_t* name,
    const wchar_t** device_name);