Re: [accelerometer] Should we throw exception when screen coordinate system is not supported?

If device has no screen, i.e., `window === null`, then we can throw immediately. In other cases, `window.screen.orientation` is sync, and available on all platforms, except Safari that has `window.orientation`.

I'm not aware of the cases / platforms where we would need to handle such errors asynchronously. We can keep this issue open, get more data and find solution after research is done.

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