Do not timeout private DNS before NetworkMonitor

NetworkMonitor uses 10+s timeout for various phases of validation (12.5s
by default for DNS probes, 10s for HTTP/HTTPS probes and private DNS
probe). Having a 10s timeout for the private DNS setting may fail tests
while NetworkMonitor is still considering it acceptable.

Increase the timeout to 30s, which matches the timeout used in
ConnectUtil to wait for NetworkMonitor validation (ensureWifiValidated).

Test: atest
Change-Id: I084f85f25a26fc8417fdb566e75e49f427391a98
1 file changed