Schemec: use tags and shiftbits constants in booleans
Schemec: use tags and shiftbits constants in booleans

No hardcoded values - you should know better than this.

Test plan:
* Tests still pass

jonaslu/thatswhatsup,jonaslu/thatswhatsup,jonaslu/thatswhatsup,jonaslu/thatswhatsup,jonaslu/thatswhatsup