Clean up accessibility quick settings "tooltips" for singular purpose

Bug: 220655084
Test: make RunSettingsRoboTests ROBOTEST_FILTER=AccessibilityQuickSettingsTooltipWindowTest LaunchAccessibilityActivityPreferenceFragmentTest ToggleAccessibilityServicePreferenceFragmentTest
Change-Id: I771ad407b04375be2679c2237a970ee418b9bf37

res/layout/accessibility_qs_tooltip.xml

@@ -0,0 +1,42 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2022 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="wrap_content"
+    android:layout_height="wrap_content"
+    android:gravity="center"
+    android:orientation="vertical"
+    android:background="@drawable/accessibility_qs_tooltip_background">
+
+    <ImageView
+        android:id="@+id/qs_illustration"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:paddingTop="@dimen/accessibility_qs_tooltip_margin_top"
+        android:layout_gravity="center_horizontal"
+        android:contentDescription="@null" />
+
+    <TextView
+        android:id="@+id/qs_content"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:padding="@dimen/accessibility_qs_tooltip_margin"
+        android:textColor="@android:color/black"
+        android:fontFamily="@*android:string/config_headlineFontFamilyMedium"
+        android:textSize="16sp" />
+
+</LinearLayout>