[WifiDialog] "Add network" return WifiConfig

When adding a network by manually entering SSID, return the wifi
configuration to the caller.

Change-Id: If490a341fe95b9c63f43d3bb30a2114bfcd45082

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

@@ -36,6 +36,7 @@ public class WifiDialogActivity extends Activity implements WifiDialog.WifiDialo
     private static final int RESULT_FORGET = RESULT_FIRST_USER + 1;
 
     private static final String KEY_ACCESS_POINT_STATE = "access_point_state";
+    private static final String KEY_WIFI_CONFIGURATION = "wifi_configuration";
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
@@ -110,6 +111,9 @@ public class WifiDialogActivity extends Activity implements WifiDialog.WifiDialo
             accessPoint.saveWifiState(accessPointState);
             resultData.putExtra(KEY_ACCESS_POINT_STATE, accessPointState);
         }
+        if (config != null) {
+            resultData.putExtra(KEY_WIFI_CONFIGURATION, config);
+        }
         setResult(RESULT_CONNECTED, resultData);
         finish();
     }