Use injected Windows Runtime component for communicating from js to c#

[MahdiGhiasi]

Use injected Windows Runtime component for communicating from js to c#

[MahdiGhiasi]

Update: Calling a WinRT function every second causes app completely freezing after a while, for some unknown reason. So we continue to use the old method for getting the app status at regular intervals.

The WinRT component will be used for communications initiated from js.

[MahdiGhiasi]

In the current development version, this method is used only for showing indeterminate progress bar while loading next song, but still I encountered an unrecoverable app freeze.

Will need to investigate more, if this happens often it might be reasonable to abandon this idea and do #18 instead. (It creates a somewhat uglier code, but if this one suffers from frequent freezes, then this is not acceptable)

[MahdiGhiasi]

I might have spoke too soon.

A likely cause for freezing app was updating MediaControls, which I'm also seeing hangs about it on live code as well. I've ran some tests and it seems that updating it a lot can cause an unrecoverable app freeze fairly quickly.

(The new code was unintentionally updating MediaControls every second, which can explain the app freezes)

I've brought back getting app status via WinRT component for now, and MediaControls now only updates when necessary.

I'll continue to monitor the behavior of the app to make sure there are no freezes caused by WinRT component in WebView.

[MahdiGhiasi]

I've never seen another freeze after fixing MediaControls update, so this is probably fine.