packages/SystemUI/res/layout/udfps_keyguard_preview.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
  ~ Copyright (C) 2023 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.
  -->

<androidx.constraintlayout.widget.ConstraintLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:contentDescription="@string/accessibility_fingerprint_label"
    android:background="@drawable/fingerprint_bg">

    <!-- LockScreen fingerprint icon from 0 stroke width to full width -->
    <com.android.systemui.keyguard.ui.view.UdfpsLottieViewWrapper
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:scaleType="centerCrop"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintHeight_percent="0.5"
        app:layout_constraintWidth_percent="0.5"
        app:lottie_autoPlay="false"
        app:lottie_loop="false"
        app:lottie_progress="1.0"
        app:lottie_colorFilter="?android:attr/textColorPrimary"
        app:lottie_rawRes="@raw/udfps_lockscreen_fp" />
</androidx.constraintlayout.widget.ConstraintLayout >