蓝牙停止扫描和一些bug修复

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

@@ -77,5 +77,10 @@ namespace Assets.Scripts.Devices.Ble
         {
             BluetoothLEHardwareInterface.StopScan();
         }
+        public void Dispose()
+        {
+            BluetoothLEHardwareInterface.StopScan();
+            BluetoothLEHardwareInterface.DisconnectAll();
+        }
     }
 }