Added WiFi Assistant settings.

+ Added ability to setup Wifi Assistant.
- Removed 'Avoid poor connections' from WiFi Advance Settings.
- Removed 'Optimize Wi-Fi' from WiFi Advance Settings.
+ Replaced checkboxes with switches in WifFI Advance Settings.
+ Added horizontal rule to seperate MAC/IP address text.

Bug: 15698824
Change-Id: Ia319ff5fb2566854666a07d0e77c8816a49fd3d6

res/layout/mac_preference.xml

@@ -0,0 +1,79 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2014 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.
+-->
+
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:minHeight="?android:attr/listPreferredItemHeightSmall"
+    android:gravity="center_vertical"
+    android:orientation="vertical"
+    android:background="?android:attr/selectableItemBackground">
+
+    <View
+        android:layout_width="fill_parent"
+        android:layout_height="@dimen/wifi_divider_height"
+        android:background="@color/wifi_divider" />
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:minHeight="?android:attr/listPreferredItemHeightSmall"
+        android:gravity="center_vertical"
+        android:background="?android:attr/selectableItemBackground">
+
+        <RelativeLayout
+            android:layout_width="0dip"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:paddingTop="6dip"
+            android:paddingBottom="6dip">
+
+            <TextView
+                android:id="@+android:id/title"
+                android:layout_width="match_parent"
+                android:layout_height="match_parent"
+                android:paddingStart="16dip"
+                android:paddingEnd="16dip"
+                android:singleLine="true"
+                android:textAppearance="?android:attr/textAppearanceSmall"
+                android:ellipsize="marquee"
+                android:fadingEdge="horizontal" />
+
+            <TextView
+                android:id="@android:id/summary"
+                android:layout_width="match_parent"
+                android:layout_height="match_parent"
+                android:layout_below="@android:id/title"
+                android:layout_alignStart="@android:id/title"
+                android:paddingStart="16dip"
+                android:layout_marginEnd="16dip"
+                android:visibility="gone"
+                android:textAppearance="?android:attr/textAppearanceSmall"
+                android:textColor="?android:attr/textColorSecondary"
+                android:maxLines="4" />
+
+        </RelativeLayout>
+
+        <LinearLayout
+            android:id="@android:id/widget_frame"
+            android:layout_width="wrap_content"
+            android:layout_height="match_parent"
+            android:gravity="center_vertical"
+            android:orientation="vertical" />
+
+    </LinearLayout>
+
+</LinearLayout>