communication/drawable-anydpi-v21/ic_swap_calls_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="M18,4l-4,4h3v7c0,1.1 -0.9,2 -2,2s-2,-0.9 -2,-2V8c0,-2.21 -1.79,-4 -4,-4S5,5.79 5,8v7H2l4,4 4,-4H7V8c0,-1.1 0.9,-2 2,-2s2,0.9 2,2v7c0,2.21 1.79,4 4,4s4,-1.79 4,-4V8h3l-4,-4z"/>
</vector>