res/layout/udfps_enroll_enrolling.xml

<?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.
  -->

<com.google.android.setupdesign.GlifLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/setup_wizard_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    style="?attr/fingerprint_layout_theme">

    <LinearLayout
        style="@style/SudContentFrame"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:clipToPadding="false"
        android:clipChildren="false"
        android:orientation="vertical">

        <TextView
            android:id="@+id/error_text"
            style="@style/TextAppearance.ErrorText"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center_horizontal|bottom"
            android:accessibilityLiveRegion="polite"
            android:gravity="center_horizontal"
            android:visibility="invisible" />
    </LinearLayout>

</com.google.android.setupdesign.GlifLayout>