social/drawable-anydpi-v21/ic_plus_one_black_24dp.xml

<vector xmlns:android="http://schemas.android.com/apk/res/android"
        android:width="24dp"
        android:height="24dp"
        android:viewportWidth="24.0"
        android:viewportHeight="24.0">
    <path
        android:fillColor="#FF000000"
        android:pathData="M10,8L8,8v4L4,12v2h4v4h2v-4h4v-2h-4zM14.5,6.08L14.5,7.9l2.5,-0.5L17,18h2L19,5z"/>
</vector>