Handle repeated/fallback to flooding packets properly

First check if it's not still in the TxQueue

src/platform/portduino/SimRadio.cpp

@@ -133,6 +133,12 @@ bool SimRadio::cancelSending(NodeNum from, PacketId id)
     return result;
 }
 
+/** Attempt to find a packet in the TxQueue. Returns true if the packet was found. */
+bool SimRadio::findInTxQueue(NodeNum from, PacketId id)
+{
+    return txQueue.find(from, id);
+}
+
 void SimRadio::onNotify(uint32_t notification)
 {
     switch (notification) {
@@ -265,4 +271,4 @@ int16_t SimRadio::readData(uint8_t *data, size_t len)
     }
 
     return state;
-}
+}