Port consent-gated one-key DM queue to keymindCascade

src/helpers/BaseChatMesh.cpp

@@ -315,6 +315,9 @@ void BaseChatMesh::onPeerDataRecv(mesh::Packet* packet, uint8_t type, int sender
 
   ContactInfo& from = contacts[i];
 
+  // A transient service peer is not an accepted chat contact.
+  if (type == PAYLOAD_TYPE_TXT_MSG && from.type == ADV_TYPE_NONE) return;
+
   if (type == PAYLOAD_TYPE_TXT_MSG && len > 5) {
     uint32_t sender_timestamp;
     memcpy(&sender_timestamp, data, 4);  // timestamp (by sender's RTC clock - which could be wrong)