Reduce default settings in WifiSetup XL.

We don't want to show every configurations in default, while
we also don't want to complicate basic wifi logics. In order to
achive both goals, we first introduce tweaked xml file
(wifi_config_preference2.xml). It does contain all the
config components but almost all of them are in "gone" visibility.
Those components are still able to act as data storage, but never
be seen as actual UI components.

Change-Id: I4ad3c1b4cbbe77ca2b628b0be25e2b3eb9d645aa

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

@@ -103,6 +103,7 @@ public class WifiSettingsForSetupWizardXL extends Activity implements OnClickLis
         ((Button)findViewById(R.id.wifi_setup_connect)).setOnClickListener(this);
         ((Button)findViewById(R.id.wifi_setup_forget)).setOnClickListener(this);
         ((Button)findViewById(R.id.wifi_setup_cancel)).setOnClickListener(this);
+        ((Button)findViewById(R.id.wifi_setup_detail)).setOnClickListener(this);
     }
 
     @Override
@@ -134,6 +135,9 @@ public class WifiSettingsForSetupWizardXL extends Activity implements OnClickLis
             mStatusText.setText(R.string.wifi_setup_status_select_network);
             mWifiSettings.detachConfigPreference();
             break;
+        case R.id.wifi_setup_detail:
+            mWifiSettings.showDialogForSelectedPreference();
+            break;
         }
         hideSoftwareKeyboard();
     }