Replace connectToWifi with ensureWifiConnected

connectToWifi expects a CONNECTIVITY_ACTION broadcast, which
may not be received if wifi is already connected.

There is already a separate test exercising the broadcast,
testToggleWifiConnectivityAction.

Bug: 283272115
Change-Id: I21a358fcb119878969eb898e15fea9da1af9a108
Test: TH
1 file changed