Re: [wake-lock] request(): Order for permission and other checks (#202)

I would do feature-policy early to avoid unnecessary work, and as @annevk said, try to at least group the exceptions if possible.

I was trying to do aborting as soon after as possible and before any async operation (like showing a dialog) but as we have multiple potential async operations (permission dialog, requesting the platform wake lock etc) then we would have to check it before each of these. 

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