Use JDK 22 on github actions as AGP requires java 17 and above

[eyedol]

Fixes CI issue where AGP requires Java 17 and above

[eyedol]

@sproctor could you merge this if all is good? It fixes an issue with a missing actual implementation for VerticalScrollbar and HorizontalScrollbar implementations for the js target.

[sproctor]

I don't want to use a non-LTS JDK. I changed it to 21. I had removed the JS target from the demo stuff since there's no JS demo. I guess I'll eventually add one, so I merged the JVM and JS implementations for the scrollbar. I've diverged pretty far from this, so I'm going to close it. If there's stuff in it that you think should be merged, create a new PR.

[eyedol]

I don't want to use a non-LTS JDK. I changed it to 21. I had removed the JS target from the demo stuff since there's no JS demo. I guess I'll eventually add one, so I merged the JVM and JS implementations for the scrollbar. I've diverged pretty far from this, so I'm going to close it. If there's stuff in it that you think should be merged, create a new PR.

Makes sense. Nah. Nothing in there deserves a merge. Good you closed it.