In an attempt to limit the number of operations done in onUpdate(), I only call dc.clear() in onLayout() and once per day in onUpdate(). On my watch (enduro 3) this works fine, I use a black background when I call drawText(), so I never get old text showing up, and I think the watchface is totally rebuilt when I go to other menus and back to the watchface. But on an Epix Pro, it doesn't by default clear the display after exiting menus, so the old menu can show up behind the text, at least until the screen goes to sleep and then wakes up again. I know the solution is to simply call dc.clear() in onUpdate(), but the docs say "onLayout() is called before the View is shown to load resources and set up the layout of the View", so I assumed it was safe to assume it could be called only in onLayout() and once per day.
