packages/SystemUI/res-keyguard/drawable/kg_bouncer_secondary_button.xml

<?xml version="1.0" encoding="utf-8"?>
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  ~ 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
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  ~ distributed under the License is distributed on an "AS IS" BASIS,
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  ~ See the License for the specific language governing permissions and
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  -->

<inset xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:androidprv="http://schemas.android.com/apk/prv/res/android"
    android:insetTop="6dp"
    android:insetBottom="6dp">
    <ripple android:color="?android:attr/colorControlHighlight">
        <item android:id="@android:id/mask">
            <shape android:shape="rectangle">
                <solid android:color="?android:attr/textColorSecondary"/>
                <corners android:radius="24dp"/>
            </shape>
        </item>
        <item>
            <shape android:shape="rectangle">
                <corners android:radius="24dp"/>
                <solid android:color="@android:color/transparent"/>
                <stroke android:color="?androidprv:attr/colorAccentTertiary"
                    android:width="1dp"
                    />
                <padding android:left="16dp"
                    android:top="12dp"
                    android:right="16dp"
                    android:bottom="12dp"/>
            </shape>
        </item>
    </ripple>
</inset>