android14运营商定制 用户代理缺失问题 no user agent in initial register

海外运营商反馈：no user agent in initial register
解决方案：

VND/device/sprd/vnd_mpool/module/vendor/telephony/main.mk
++PRODUCT_VENDOR_PROPERTIES += persist.vendor.radio.feature.bitmask ?= 8

VND/vendor/sprd/modules/rild/impl-ril/impl_ril.c
void sendImsUserAgentProp(RIL_SOCKET_ID socket_id) {
    int err = -1;
    char cmd[MAX_BUFFER_BYTES] = {0};
    char type[AT_COMMAND_LEN] = {0};
    ++//char type1[AT_COMMAND_LEN] = {0};
    ++//char type2[AT_COMMAND_LEN] = {0};
    ++//char type3[AT_COMMAND_LEN] = {0};
    ++//char type4[AT_COMMAND_LEN] = {0};
    ++//char type5[AT_COMMAND_LEN] = {0};
    ........
    ++/*snprintf(type, sizeof(type), "%s", model_val);  //default
    snprintf(type1, sizeof(type1), "%s%s%s", model_val, " ", sw_version_a);
    snprintf(type2, sizeof(type2), "%s%s%s%s%s%s", model_val, " ", sw_version_a, " ", "Android", android_version);
    snprintf(type3, sizeof(type3), "%s%s%s", model_val, " ", sw_version_b);
    snprintf(type4, sizeof(type4), "%s%s%s%s%s", model_val, " ", model_display_val, " ", sw_version_a);
    snprintf(type5, sizeof(type5), "%s%s%s%s%s%s%s", "Telstra", " ", model_val, " ", m++odel_display_val, " ", sw_version_a);*/
	
    ++snprintf(type, sizeof(type), "%s", "XXXX");//客户型号

    ++/*RLOGD("sendImsUserAgentProp: type = %s, type1 = %s, type2 = %s, type3 = %s, type4 = %s, type5 = %s, type6 = %s",
    ++ type, type1, type2, type3, type4, type5, type6);*/
	++RLOGD("sendImsUserAgentProp: type = %s",type);
    ++/*the length of a single UA does not exceed 128 and the total length of UA does ++not exceed 1024*/
    ++/*snprintf(cmd, sizeof(cmd), "AT+SPENGMDVOLTE=22,1,\"%s||%s||%s||%s||%s||%s||%s\"", type, type1, type2, type3, type4, type5, type6);*/
	++snprintf(cmd, sizeof(cmd), "AT+SPENGMDVOLTE=22,1,\"%s\"", type);

验证：
插SIM卡开机，查看ylog\poweron\modem里面的log，查找对应的user agent值