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/wifi/WifiConfigUiBase.java

@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.settings.wifi;
+
+import android.content.Context;
+import android.view.LayoutInflater;
+import android.widget.Button;
+
+/**
+ * Foundation interface glues between Activities and UIs like
+ * {@link WifiDialog} or {@link WifiConfigController}.
+ */
+public interface WifiConfigUiBase {
+    public Context getContext();
+    public WifiConfigController getController();
+    public LayoutInflater getLayoutInflater();
+    public boolean isEdit();
+
+    public void setTitle(int id);
+    public void setTitle(CharSequence title);
+
+    public void setSubmitButton(CharSequence text);
+    public void setForgetButton(CharSequence text);
+    public void setCancelButton(CharSequence text);
+    public Button getSubmitButton();
+    public Button getForgetButton();
+    public Button getCancelButton();
+}