Signal-Android/app/src/main/res/navigation/chat_wallpaper.xml

<?xml version="1.0" encoding="utf-8"?>
<navigation 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:id="@+id/chat_wallpaper"
    app:startDestination="@id/chatWallpaperFragment">

    <fragment
        android:id="@+id/chatWallpaperFragment"
        android:name="org.thoughtcrime.securesms.wallpaper.ChatWallpaperFragment"
        android:label="chat_wallpaper_fragment"
        tools:layout="@layout/chat_wallpaper_fragment">

        <action
            android:id="@+id/action_chatWallpaperFragment_to_chatWallpaperSelectionFragment"
            app:destination="@id/chatWallpaperSelectionFragment"
            app:enterAnim="@anim/fragment_open_enter"
            app:exitAnim="@anim/fragment_open_exit"
            app:popEnterAnim="@anim/fragment_close_enter"
            app:popExitAnim="@anim/fragment_close_exit"  />
    </fragment>
    <fragment
        android:id="@+id/chatWallpaperSelectionFragment"
        android:name="org.thoughtcrime.securesms.wallpaper.ChatWallpaperSelectionFragment"
        android:label="chat_wallpaper_selection_fragment"
        tools:layout="@layout/chat_wallpaper_selection_fragment">
    </fragment>
</navigation>