[Accessibility] Add contrast control screen UI and setup entry point

Bug: 241805782
Test: atest, local raven device
Screenshot: attached on bug
Flag: aconfig
com.android.settings.accessibility.enable_color_contrast_control

Change-Id: I7fcc01b822b460c6585c41a5831575ba0ffbcc93

res/xml/accessibility_color_and_motion.xml

@@ -21,6 +21,16 @@
     android:persistent="false"
     android:title="@string/accessibility_color_and_motion_title">
 
+    <Preference
+        android:fragment="com.android.settings.accessibility.ColorContrastFragment"
+        android:key="color_contrast"
+        android:icon="@drawable/ic_color_contrast"
+        android:persistent="false"
+        android:title="@string/accessibility_color_contrast_title"
+        android:summary="@string/accessibility_color_contrast_summary"
+        settings:controller="com.android.settings.accessibility.ContrastPreferenceController"
+        settings:searchable="true"/>
+
     <Preference
         android:fragment="com.android.settings.accessibility.ToggleDaltonizerPreferenceFragment"
         android:icon="@drawable/ic_daltonizer"

res/xml/accessibility_color_contrast.xml

@@ -0,0 +1,38 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (C) 2024 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.
+  -->
+
+<PreferenceScreen
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:settings="http://schemas.android.com/apk/res-auto"
+    android:persistent="false"
+    android:title="@string/accessibility_color_contrast_title">
+
+    <com.android.settingslib.widget.TopIntroPreference
+        android:title="@string/accessibility_color_contrast_intro" />
+
+    <com.android.settingslib.widget.LayoutPreference
+        android:key="color_contrast_selector"
+        android:selectable="false"
+        android:layout="@layout/accessibility_color_contrast_selector"
+        settings:controller="com.android.settings.accessibility.ContrastSelectorPreferenceController"/>
+
+    <com.android.settings.accessibility.AccessibilityFooterPreference
+        android:title="@string/color_contrast_note"
+        android:selectable="false"
+        settings:searchable="false"/>
+
+</PreferenceScreen>