Add a message in the notification for the caption. Fixes #2602

Author: bmarty

libraries/push/impl/src/main/kotlin/io/element/android/libraries/push/impl/notifications/factories/NotificationCreator.kt

@@ -424,6 +424,17 @@ class DefaultNotificationCreator @Inject constructor(
                         message.extras.putString(MESSAGE_EVENT_ID, event.eventId.value)
                     }
                     addMessage(message)
+
+                    // Add additional message for captions
+                    if (event.imageUri != null && event.body != null) {
+                        addMessage(
+                            MessagingStyle.Message(
+                                event.body,
+                                event.timestamp,
+                                senderPerson,
+                            )
+                        )
+                    }
                 }
             }
         }