fix #1678: Update MeshService.kt to store the channel for received packets. (#1683)

* Update MeshService.kt to store the channel for received packets.

The channel for received packets is now stored, allowing for better tracking and management.

* Update node info creation to include channel data

- Updates `getOrCreateNodeInfo` to accept a channel parameter and to save the channel to the node info during instantiation of a new/unknown node.
- Updates `updateNodeInfo` to accept a channel parameter and pass it to the updated function.
- Updates call to `updateNodeInfo` in `handleReceivedData` to pass the packet channel data to it.

app/src/main/java/com/geeksville/mesh/service/MeshService.kt

@@ -473,7 +473,7 @@ class MeshService : Service(), Logging {
         }
 
     // given a nodeNum, return a db entry - creating if necessary
-    private fun getOrCreateNodeInfo(n: Int) = nodeDBbyNodeNum.getOrPut(n) {
+    private fun getOrCreateNodeInfo(n: Int, channel: Int = 0) = nodeDBbyNodeNum.getOrPut(n) {
         val userId = DataPacket.nodeNumToDefaultId(n)
         val defaultUser = user {
             id = userId
@@ -486,6 +486,7 @@ class MeshService : Service(), Logging {
             num = n,
             user = defaultUser,
             longName = defaultUser.longName,
+            channel = channel,
         )
     }
 
@@ -527,9 +528,10 @@ class MeshService : Service(), Logging {
     private inline fun updateNodeInfo(
         nodeNum: Int,
         withBroadcast: Boolean = true,
+        channel: Int = 0,
         crossinline updateFn: (NodeEntity) -> Unit,
     ) {
-        val info = getOrCreateNodeInfo(nodeNum)
+        val info = getOrCreateNodeInfo(nodeNum, channel)
         updateFn(info)
 
         if (info.user.id.isNotEmpty() && haveNodeDB) {
@@ -1174,7 +1176,7 @@ class MeshService : Service(), Logging {
 
             // Do not generate redundant broadcasts of node change for this bookkeeping updateNodeInfo call
             // because apps really only care about important updates of node state - which handledReceivedData will give them
-            updateNodeInfo(fromNum, withBroadcast = false) {
+            updateNodeInfo(fromNum, withBroadcast = false, channel = packet.channel) {
                 // Update our last seen based on any valid timestamps.  If the device didn't provide a timestamp make one
                 it.lastHeard = packet.rxTime
                 it.snr = packet.rxSnr