app/src/main/res/drawable/greeting_icon.xml
<vector android:height="24dp" android:tint="#000000"
android:viewportHeight="24" android:viewportWidth="24"
android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
<path android:fillColor="@android:color/white" android:pathData="M20,2L4,2c-1.1,0 -2,0.9 -2,2v18l4,-4h14c1.1,0 2,-0.9 2,-2L22,4c0,-1.1 -0.9,-2 -2,-2zM20,16L6,16l-2,2L4,4h16v12z"/>
</vector>