fix: use message's expiry instead of the recipient's

libsession/src/main/java/org/session/libsession/messaging/messages/visible/VisibleMessage.kt

@@ -20,6 +20,7 @@ class VisibleMessage : Message()  {
     var linkPreview: LinkPreview? = null
     var contact: Contact? = null
     var profile: Profile? = null
+    var expiry: Int = 0
 
     override val isSelfSendValid: Boolean = true
 
@@ -47,6 +48,9 @@ class VisibleMessage : Message()  {
             // TODO Contact
             val profile = Profile.fromProto(dataMessage)
             profile?.let { result.profile = profile }
+            if (dataMessage.hasExpireTimer()) {
+                result.expiry = dataMessage.expireTimer
+            }
             return  result
         }
     }