google-material-design-icons/android/content/flag/materialiconsround/black/res/drawable/round_flag_20.xml

<vector xmlns:android="http://schemas.android.com/apk/res/android"
    android:width="20dp"
    android:height="20dp"
    android:viewportWidth="20"
    android:viewportHeight="20"
    android:tint="?attr/colorControlNormal">
  <path
      android:fillColor="@android:color/white"
      android:pathData="M11.5,5l-0.31,-1.24C11.08,3.31 10.68,3 10.22,3H5C4.45,3 4,3.45 4,4v13h1.5v-6h5l0.31,1.24c0.11,0.45 0.51,0.76 0.97,0.76H15c0.55,0 1,-0.45 1,-1V6c0,-0.55 -0.45,-1 -1,-1H11.5z"/>
</vector>