google-material-design-icons/symbols/android/add_2/materialsymbolsoutlined/add_2_fill1_20px.xml

<vector xmlns:android="http://schemas.android.com/apk/res/android"
    android:width="20dp"
    android:height="20dp"
    android:viewportWidth="960"
    android:viewportHeight="960"
    android:tint="?attr/colorControlNormal">
  <path
      android:fillColor="@android:color/white"
      android:pathData="M444,816L444,516L144,516L144,444L444,444L444,144L516,144L516,444L816,444L816,516L516,516L516,816L444,816Z"/>
</vector>