NetworkRequestDialog: Exit the dialog on connect failure

Connection failure (similar to connection success) is the end of the
processng of a request. We should dismiss the dialog on connection
failure.

Bug: 158844146
Bug: 158616070
Test: Manual tests - Simulate connection failure and ensure that the
dialog vanishes with a toast.

Change-Id: I625ca76298ed549dbed76d398aea0c957c9102fc
Merged-In: I625ca76298ed549dbed76d398aea0c957c9102fc

src/com/android/settings/wifi/NetworkRequestDialogFragment.java

@@ -324,11 +324,6 @@ public class NetworkRequestDialogFragment extends NetworkRequestDialogBaseFragme
         }
     }
 
-    @Override
-    public void onUserSelectionConnectFailure(WifiConfiguration wificonfiguration) {
-        // Do nothing when selection is failed, let user could try again easily.
-    }
-
     @VisibleForTesting
     final class FilterWifiTracker {
         private final List<String> mAccessPointKeys;