Fix Dns64Configuration not using local name server

Dns64Configuration and clatd query NAT64 prefix at the same time when
network is up, but Dns64Configuration doesn't bypass TLS while clatd
does. This could cause 464xlat failure if we get the response from
Dns64Configuration prior to clatd, and the response is no answer, clatd
interface will not up even though we could have had the answer from
local name server.

Bug: 119992869
Test: checked Dns64Configuration queries bypass TLS
Change-Id: I372f850c6b985b6ae354322415ff4d4593e9c829
1 file changed