Allow adjusting MediaElement status polling timer tick rate

[jcsnider]

MediaElement has a DispatcherTimer that is set to fetch and update media playback status properties such as Position every 200 milliseconds.
Ref:

Maui/src/CommunityToolkit.Maui.MediaElement/MediaElement.shared.cs

Line 542 in 819ab10

timer.Interval = TimeSpan.FromMilliseconds(200);

Ideally we would be able to set the interval value to be more or less frequent as needed on an element by element basis.