Lib.SystemService: Add SDK checks for console language (#4444)

* Add proper SDK checks for language values

Fixes some crashes caused by otherwise valid languages in older titles.

* Rename firmware constants

Makes more sense this way, and works better in case we find an SDK check added in a more minor update.
Instead of 1.00 being 10, 1.50 being 15, and so on, this commit changes 1.00 to 100, 1.50 to 150, and so on.

* Claaaaang