adding a new string for Marking as Read, to be used in the notification

app/src/main/res/values-lt/strings.xml

@@ -16,6 +16,7 @@
     <!-- Notifications -->
     <string name="channel_received_sms">Gautos žinutės</string>
     <string name="new_message">Nauja žinutė</string>
+    <string name="mark_as_read">Mark as Read</string>
 
     <!-- Confirmation dialog -->
     <string name="delete_whole_conversation_confirmation">Ar tikrai norite ištrinti visas šio pokalbio žinutes?</string>

app/src/main/res/values-pt/strings.xml

@@ -16,6 +16,7 @@
     <!-- Notifications -->
     <string name="channel_received_sms">SMS recebida</string>
     <string name="new_message">Nova mensagem</string>
+    <string name="mark_as_read">Mark as Read</string>
 
     <!-- Confirmation dialog -->
     <string name="delete_whole_conversation_confirmation">Tem a certeza de que deseja eliminar todas as mensagens desta conversa?</string>

app/src/main/res/values-ru/strings.xml

@@ -16,6 +16,7 @@
     <!-- Notifications -->
     <string name="channel_received_sms">Получено SMS</string>
     <string name="new_message">Новое сообщение</string>
+    <string name="mark_as_read">Mark as Read</string>
 
     <!-- Confirmation dialog -->
     <string name="delete_whole_conversation_confirmation">Вы уверены, что хотите удалить все сообщения в этой переписке?</string>

app/src/main/res/values-sk/strings.xml

@@ -16,6 +16,7 @@
     <!-- Notifications -->
     <string name="channel_received_sms">Prijatá SMS</string>
     <string name="new_message">Nová správa</string>
+    <string name="mark_as_read">Označiť ako prečítané</string>
 
     <!-- Confirmation dialog -->
     <string name="delete_whole_conversation_confirmation">Ste si istý, že chcete odstrániť všetky správy tejto konverzácie?</string>

app/src/main/res/values/strings.xml

@@ -16,6 +16,7 @@
     <!-- Notifications -->
     <string name="channel_received_sms">Received SMS</string>
     <string name="new_message">New message</string>
+    <string name="mark_as_read">Mark as Read</string>
 
     <!-- Confirmation dialog -->
     <string name="delete_whole_conversation_confirmation">Are you sure you want to delete all messages of this conversation?</string>