Add transcoding matcher for heightGreaterThan

[Petr Nejedly]

We have maxHeight option, but that limits the output height of transcoded video, which is matched already.

In some case, we want to match videos with high resolution (which would normally be delivered natively) and limit their resolution.

Add a heightGreaterThan matcher parameter to provide this. This can then be added to profiles that don't support 4k playback.

[Giovanni Musto]

I suggest to also add widthGreaterThan, to account for videos with aspect ratio wider than TV's own.

[Petr Nejedly]

done both