[PATCH 0/4] MR7559: cfgmgr32: Implement CM_Register_Notification and CM_Unregister_Notification.

[Vibhav Pant (＠vibhavp)]

The methods are needed to implement Bluetooth device pairing in `bluetoothapis.dll` without having to create a dummy window for `RegisterDeviceNotification`, as that may break CLI applications.

`CM_Register_Notification` is implemented as a thin wrapper over `I_ScRegisterDeviceNotification`, mapping `DBT_*` flags to their associated `CM_NOTIFY_*` constants.