Remove portrait support in SetupWizard

We support sensorLandscape for a moment.

See also I45e30c652feab1d30c4f0379379f8ca4e455fa02

- Use sensorLandscape instead of default
- Modify paddings in default xmls to layout landscape stuffs
  correctly

Change-Id: Ife03de69e4d1d2d898cd0e8de3cefd733aea8f19

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

@@ -21,7 +21,6 @@ import com.android.settings.R;
 import android.app.Activity;
 import android.content.Context;
 import android.content.Intent;
-import android.content.res.Configuration;
 import android.net.NetworkInfo.DetailedState;
 import android.net.wifi.WifiConfiguration;
 import android.net.wifi.WifiManager;
@@ -747,8 +746,7 @@ public class WifiSettingsForSetupWizardXL extends Activity implements OnClickLis
      * Replace the current background with a new background whose id is resId if needed.
      */
     private void trySetBackground(int resId) {
-        final int orientation = getResources().getConfiguration().orientation;
-        if (orientation == Configuration.ORIENTATION_LANDSCAPE && mBackgroundId != resId) {
+        if (mBackgroundId != resId) {
             getWindow().setBackgroundDrawable(getResources().getDrawable(resId));
             mBackgroundId = resId;
         }