libcutils: reimplement property_list() using __system_property_foreach()

    return len;

}

int property_list(void (*propfn)(const char *key, const char *value, void *cookie), 

                  void *cookie)

struct property_list_callback_data

{

    void (*propfn)(const char *key, const char *value, void *cookie);

    void *cookie;

};

static void property_list_callback(const prop_info *pi, void *cookie)

{

    char name[PROP_NAME_MAX];

    char value[PROP_VALUE_MAX];

    const prop_info *pi;

    unsigned n;

    struct property_list_callback_data *data = cookie;

    for(n = 0; (pi = __system_property_find_nth(n)); n++) {

    __system_property_read(pi, name, value);

        propfn(name, value, cookie);

    data->propfn(name, value, data->cookie);

}

    return 0;

int property_list(

        void (*propfn)(const char *key, const char *value, void *cookie),

        void *cookie)

{

    struct property_list_callback_data data = { propfn, cookie };

    return __system_property_foreach(property_list_callback, &data);

}

#elif defined(HAVE_SYSTEM_PROPERTY_SERVER)