Fix retry time value in dnsQueryEvent when perform DNS query over TCP

DNS queries over TCP can only be made once per server.
The retry time value of dnsQueryEvent on TCP should always be "0".
(Currently, it will populate the wrong value from the variable
"retryTimes".)

Bug: 147343838
Test: atest
Change-Id: I67b9602fcf9882e8035765e1598c16cf36bfb5e4