conversations-classic/src/main/res/drawable/infocard_border.xml

<?xml version="1.0" encoding="UTF-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" >

    <solid android:color="@color/grey50" />

    <corners android:radius="2dp" />

    <stroke
        android:width="0.5dp"
        android:color="@color/black12" >
    </stroke>
    
    <padding
        android:bottom="0dp"
        android:left="0dp"
        android:right="0dp"
        android:top="0dp" />

</shape>