packages/overlays/IconPackFilledAndroidOverlay/res/drawable/ic_expand_more.xml

<!--
/**
 * 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.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
-->
<vector xmlns:android="http://schemas.android.com/apk/res/android"
    android:width="24dp"
    android:height="24dp"
    android:viewportWidth="24"
    android:viewportHeight="24">

    <path
        android:pathData="M 0 0 H 24 V 24 H 0 V 0 Z" />
    <path
        android:fillColor="#000000"
        android:pathData="M19.29,8.29a1,1,0,0,0-1.41,0L12,14.17,6.12,8.29A1,1,0,1,0,4.71,9.71l6.58,6.58a1,1,0,0,0,1.42,0l6.58-6.58A1,1,0,0,0,19.29,8.29Z" />
</vector>