修复登出设备连接释放资源bug

Assets/Scripts/Devices/Ble/mobile/BleMobileInterface.cs

@@ -378,7 +378,7 @@ namespace Assets.Scripts.Ble
         {
             pCache.Clear();
             _discoveredCallback = discoveredCallBack;
-            bleMobileThread.StartWatcher();
+            bleMobileThread?.StartWatcher();
         }
 
         public void StopScan()
@@ -457,12 +457,10 @@ namespace Assets.Scripts.Ble
         {
             if (bleMobileThread == null)
                 return;
-            bleMobileThread.ManagerInitialized -= BleMobileThread_ManagerInitialized;
-            bleMobileThread.ManagerStatusChanged -= ManagerStatusChanged;
-            bleMobileThread.ScanInfoReceived -= WatcherScanInfoReceived;
+            //bleMobileThread.ManagerInitialized -= BleMobileThread_ManagerInitialized;
+            //bleMobileThread.ManagerStatusChanged -= ManagerStatusChanged;
+            //bleMobileThread.ScanInfoReceived -= WatcherScanInfoReceived;
             bleMobileThread.Dispose();
-            bleMobileThread = null;
-            hwInterface = null;
             pCache.Clear();
         }