fix(MeshService): revert `myNodeInfo` to local variable

avoids performance issues and simplifies state management as `MyNodeInfo` is only relevant during an active session

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

@@ -329,7 +329,7 @@ class MeshService : Service(), Logging {
     /// BEGINNING OF MODEL - FIXME, move elsewhere
     ///
 
-    val myNodeInfo: MyNodeInfo? get() = radioConfigRepository.myNodeInfo.value
+    private var myNodeInfo: MyNodeInfo? = null
 
     private val configTotal by lazy { ConfigProtos.Config.getDescriptor().fields.size }
     private val moduleTotal by lazy { ModuleConfigProtos.ModuleConfig.getDescriptor().fields.size }
@@ -1517,15 +1517,11 @@ class MeshService : Service(), Logging {
                 errormsg("Did not receive a valid config")
             } else {
                 debug("Installing new node DB")
+                myNodeInfo = newMyNodeInfo
+
                 radioConfigRepository.installNodeDB(newMyNodeInfo!!, newNodes.map { it.toEntity() })
                 newNodes.clear() // Just to save RAM ;-)
 
-                withTimeoutOrNull(timeMillis = 5000) {
-                    while (myNodeInfo == null) {
-                        delay(100)
-                    }
-                } ?: errormsg("Timeout: installNodeDB failed!")
-
                 haveNodeDB = true // we now have nodes from real hardware
 
                 sendToRadio(newMeshPacketTo(myNodeNum).buildAdminPacket {