Merge changes from topic "tutorial_improvement" into rvc-dev

* changes:
  Tutorial improvement for Accessibility shortcut (3/n).
  Tutorial improvement for Accessibility shortcut (2/n).
  Tutorial improvement for Accessibility shortcut (1/n).

res/layout/accessibility_shortcut_tutorial_dialog.xml

@@ -0,0 +1,58 @@
+<!--
+    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.
+  -->
+
+<ScrollView
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:gravity="center"
+    android:textDirection="locale"
+    android:scrollbarStyle="outsideOverlay">
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="vertical"
+        android:padding="24dp">
+
+        <TextSwitcher
+            android:id="@+id/title"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:measureAllChildren="false" />
+
+        <androidx.viewpager.widget.ViewPager
+            android:id="@+id/view_pager"
+            android:layout_width="match_parent"
+            android:layout_height="176dp"
+            android:paddingTop="16dp"
+            android:paddingBottom="16dp" />
+
+        <LinearLayout
+            android:id="@+id/indicator_container"
+            android:layout_width="wrap_content"
+            android:layout_height="10dp"
+            android:layout_gravity="center" />
+
+        <TextSwitcher
+            android:id="@+id/instruction"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="16dp"
+            android:measureAllChildren="false" />
+    </LinearLayout>
+
+</ScrollView>