ring-android/app/src/main/res/layout/activity_conversation.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#ebeff0"
    tools:context=".client.ConversationActivity">

    <androidx.appcompat.widget.Toolbar
        android:id="@+id/main_toolbar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentStart="true"
        android:layout_alignParentTop="true"
        android:background="@color/color_primary_light"
        android:elevation="4dp"
        android:minHeight="?attr/actionBarSize"
        android:popupTheme="@style/Theme.MaterialComponents.Light.NoActionBar"
        android:theme="@style/ThemeOverlay.MaterialComponents.Dark.ActionBar"
        app:contentInsetStart="72dp"
        app:elevation="4dp"
        app:subtitleTextAppearance="@style/TextAppearance.Widget.AppCompat.Toolbar.Subtitle"
        app:titleMarginStart="24dp"
        app:titleTextAppearance="@style/TextAppearance.Widget.AppCompat.Toolbar.Title" />

    <FrameLayout
        android:id="@+id/main_frame"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_below="@id/main_toolbar"
        android:layout_alignParentStart="true" />
</RelativeLayout>