Show toast warning for duplicate attachments

app/src/main/res/values-pa-rPK/strings.xml

@@ -20,6 +20,8 @@
     <string name="unpin_conversation">Unpin</string>
     <string name="forward_message">اگے</string>
     <string name="compress_error">تصویر نوں چݨے ہوۓ اکار وچ سنکُچت کر نہیں سکدی</string>
+    <!-- Attachments-->
+    <string name="duplicate_item_warning">Duplicate item was not included</string>
     <!-- vCard-->
     <plurals name="and_other_contacts">
         <item quantity="one">تے %d ہور</item>