windows.devices.enumeration: Add a basic implementation for DeviceInformationStatics::FindAllAsync().
The basic FindAllAsync() method returns a collection of DeviceInformation objects representing all device interfaces on the system. This MR adds a basic implementation of this method, and the associated IDeviceInformation and DeviceInformationCollection objects it returns. For IDeviceInformation, this MR only implements the Id() method, which returns the symbolic link for the registered interface.
A basic working DeviceInformation and FindAll implementation is needed to implement DeviceWatcher's Added, Removed events, which in turn is required for basic device discovery in Windows.Devices.Bluetooth.
Edited by Vibhav Pant