currently I have one page, which shows a list of "available plugins" that each can be configured with a few fields, and the list of "currently configured plugins". The page uses a bit of CSS and Javascript.

Is that really so important to use templates in this case? Maybe for Android you could just render native UI

I really need this to be a remotely accessible web page. This is the "admin" page for a an Android tablet that displays various information - this tablet would not be directly accessible.

I see what you mean, would it's local web server with admin page. What exactly do you need from templates? I mean which features