arcanechat-android/res/layout/conversation_item_update.xml

<?xml version="1.0" encoding="utf-8"?>
<org.thoughtcrime.securesms.ConversationUpdateItem
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/conversation_update_item"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="@drawable/conversation_item_background"
    android:focusable="true"
    android:gravity="center"
    android:orientation="vertical"
    android:paddingTop="13dp"
    android:paddingBottom="13dp"
    android:paddingLeft="28dp"
    android:paddingRight="28dp">

    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:orientation="vertical">

        <TextView
            android:id="@+id/conversation_update_body"
            style="@style/Delta.Text.UpdateHeader"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:autoLink="none"
            android:linksClickable="false"
            android:gravity="center"
            android:textColor="?attr/conversation_item_update_text_color"
            android:background="@drawable/conversation_item_update_background"
            android:paddingLeft="10dp"
            android:paddingTop="3dp"
            android:paddingRight="10dp"
            android:paddingBottom="3dp"
            tools:text="Gwen Stacy added to group" />

    </LinearLayout>

</org.thoughtcrime.securesms.ConversationUpdateItem>