[PATCH v2 0/5] MR7997: windows.device.enumeration: Implement initial device enumeration for DeviceWatcher.

[Vibhav Pant (＠vibhavp)]

After `DeviceWatcher::Start()` gets called, `DeviceWatcher` enumerates through a list of all `DeviceInformation` objects on the current system through the `Added` event handlers, dispatching `EnumerationCompleted` once this has finished. This MR implements this functionality.

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  v2: windows.devices.enumeration: Implement initial device enumeration for DeviceWatcher::Start().
      windows.devices.enumeration: Implement EnumerationCompleted handler for DeviceWatcher.
      windows.devices.enumeration: Implement CreateWatcher.
      windows.devices.enumeration: Implement Added handler for DeviceWatcher.
      windows.devices.enumeration: Add tests for initial device enumeration in DeviceWatcher.

https://gitlab.winehq.org/wine/wine/-/merge_requests/7997