Add Wifi Setup screen for Setup Wizard with XL size screen.

* Add WifiSettingsForSetupWizardXL as a new Activity
The activity has WifiSettings fragment in it. It also contains
several buttons, texts around the fragment.

* Making configuration UI part of Preference list.
In Wifi Setup for Setup Wizard XL, WifiSettings fragment lets
a UI for configuring access points shown inside a
PregerenceCategory object, while it has been shown as Dialog.

To achieve this action, WifiDialog is decomposed into two parts:
- WifiConfigUiBase (Mainly UI part)
- WifiConfigController (Mainly Wifi controller part)

All codes for wifi configuration in WifiDialog is now in
WifiConfigController, which is reused from
WifiConfigPreference.

* Misc stuff
- Remove AccessPoint#compareTo(). Instead,
  AccessPoint.AccessPointComparater should be used when needed.

Change-Id: I520d690d3301837d32f91dad54a973a379ce1989

src/com/android/settings/ProgressCategory.java

@@ -21,9 +21,7 @@ import android.preference.PreferenceCategory;
 import android.util.AttributeSet;
 import android.view.View;
 
-import java.util.Map;
-
-public class ProgressCategory extends PreferenceCategory {
+public class ProgressCategory extends ProgressCategoryBase {
 
     private boolean mProgress = false;
     private View oldView = null;
@@ -36,10 +34,10 @@ public class ProgressCategory extends PreferenceCategory {
     @Override
     public void onBindView(View view) {
         super.onBindView(view);
-        View textView = view.findViewById(R.id.scanning_text);
-        View progressBar = view.findViewById(R.id.scanning_progress);
+        final View textView = view.findViewById(R.id.scanning_text);
+        final View progressBar = view.findViewById(R.id.scanning_progress);
 
-        int visibility = mProgress ? View.VISIBLE : View.INVISIBLE;
+        final int visibility = mProgress ? View.VISIBLE : View.INVISIBLE;
         textView.setVisibility(visibility);
         progressBar.setVisibility(visibility);
 
@@ -50,11 +48,8 @@ public class ProgressCategory extends PreferenceCategory {
         }
         oldView = view;
     }
-    
-    /**
-     * Turn on/off the progress indicator and text on the right.
-     * @param progressOn whether or not the progress should be displayed 
-     */
+
+    @Override
     public void setProgress(boolean progressOn) {
         mProgress = progressOn;
         notifyChanged();