res/drawable/ic_notification_alert.xml

<?xml version="1.0" encoding="UTF-8"?>
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Copyright (C) 2019 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.
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<vector xmlns:android="http://schemas.android.com/apk/res/android"
        android:width="24dp"
        android:height="24dp"
        android:viewportWidth="24"
        android:viewportHeight="24"
        android:tint="?android:attr/colorControlNormal">
    <path
        android:fillColor="@android:color/white"
        android:pathData="M18 17v-6c0-3.07-1.63-5.64-4.5-6.32V4c0-0.83-0.67-1.5-1.5-1.5s-1.5 0.67 -1.5 1.5v0.68C7.64 5.36 6 7.92 6 11v6H4v2h16v-2h-2zm-2 0H8v-6c0-2.48 1.51-4.5 4-4.5s4 2.02 4 4.5v6zm-6 3h4c0 1.1-0.9 2-2 2s-2-0.9-2-2zm12-9h-2c0-2.74-1.23-5.19-3.16-6.84l1.41-1.41C20.54 4.77 22 7.71 22 11zM5.75 2.75l1.41 1.41C5.23 5.81 4 8.26 4 11H2c0-3.29 1.46-6.23 3.75-8.25z" />
</vector>