Fix the issue that title of Color inversion page is wrong

* Title need to be set from getPreferenceScreenResId(), recover the xml file.

Bug: 156201719
Test: manual test
Change-Id: Ib8b79c320c6a48b1dd679738ddc7022ccaeaed86

res/xml/accessibility_color_inversion_settings.xml

@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2020 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"
+    android:persistent="false"
+    android:title="@string/accessibility_display_inversion_preference_title">
+</PreferenceScreen>

src/com/android/settings/accessibility/ToggleColorInversionPreferenceFragment.java

@@ -56,6 +56,11 @@ public class ToggleColorInversionPreferenceFragment extends ToggleFeaturePrefere
         Settings.Secure.putInt(getContentResolver(), ENABLED, enabled ? ON : OFF);
     }
 
+    @Override
+    protected int getPreferenceScreenResId() {
+        return R.xml.accessibility_color_inversion_settings;
+    }
+
     @Override
     protected void onRemoveSwitchPreferenceToggleSwitch() {
         super.onRemoveSwitchPreferenceToggleSwitch();