Reconnects networks after testIsPrivateDnsBroken

testIsPrivateDnsBroken updates private dns strict mode, which triggers
NetworkMonitor re-validation for both cell and wifi.
To make sure both cell and wifi are re-validated after the test, reconnect
them at the end of the test

Test: testIsPrivateDnsBroken
Bug: 357761165
Change-Id: Ie2e29e338b832fd228b653a8a2778cb5cf1d4911
1 file changed