Fill xml message layouts with dummy values

app/src/main/res/layout/message_item_compact.xml

@@ -1,6 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <androidx.constraintlayout.widget.ConstraintLayout 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="wrap_content"
     android:orientation="vertical"
@@ -12,6 +13,7 @@
         android:layout_width="wrap_content"
         android:layout_height="20dp"
         android:layout_marginEnd="8dp"
+        tools:text="1 hour ago"
         app:layout_constraintEnd_toStartOf="@+id/message_delete"
         app:layout_constraintTop_toTopOf="parent" />
 
@@ -21,6 +23,7 @@
         android:layout_height="wrap_content"
         android:layout_marginStart="8dp"
         android:layout_marginEnd="8dp"
+        tools:text="A Notification Title"
         android:textSize="16sp"
         android:textStyle="bold"
         app:layout_constraintEnd_toStartOf="@+id/message_date"
@@ -33,6 +36,7 @@
         android:layout_height="40dp"
         android:layout_marginStart="0dp"
         android:layout_marginTop="0dp"
+        tools:src="@drawable/gotify"
         android:contentDescription="@string/message_image_desc"
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toTopOf="parent"
@@ -46,6 +50,7 @@
         android:layout_marginTop="3dp"
         android:layout_marginEnd="8dp"
         android:textIsSelectable="true"
+        tools:text="The message text."
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintStart_toEndOf="@+id/message_image"
         app:layout_constraintTop_toBottomOf="@+id/message_title" />