Add support for STMC

VLC Windows does not support windows audio management (STMC) API's. Please add Add Full support for STMC including:

• SystemMediaTransportControlshttps://docs.microsoft.com/en-us/uwp/api/windows.media.systemmediatransportcontrols.updatetimelineproperties?view=winrt-19041

• SystemMediaTransportControlsSessionManagerhttps://docs.microsoft.com/en-us/uwp/api/windows.media.systemmediatransportcontrols?view=winrt-19041

• SystemMediaTransportControls.UpdateTimelinePropertieshttps://docs.microsoft.com/en-us/uwp/api/windows.media.systemmediatransportcontrols.updatetimelineproperties?view=winrt-19041

• SystemMediaTransportControls.PlaybackPositionChangeRequestedhttps://docs.microsoft.com/en-us/uwp/api/windows.media.systemmediatransportcontrols.playbackpositionchangerequested?view=winrt-19041