Clear local test results across DNS lookups.

If InetAddress.getAllByName("ipv6.google.com") throws
UnknownHostException, the test silently ignores it. This
causes a misleading failure, because the test then reuses the
addrs variable that is left over from the previous DNS query
for "www.google.com", and fails because it has an IPv4 address.

Fixes: 12210306
Bug: 29231261
Change-Id: I1dde945765d40a84eba139055306b07ebc97d0ec
1 file changed