Default What files are needed to fully port wifi calling?

So I've been getting some pretty serious wake locks with the stock 4.4 wifi calling app on my g2, so I went and started experimenting with other LG T-mo roms. I just extracted the WifiCall.apk and the ims-service.apk from the G-flex rom from 4.2 to see what difference I would see. So far, the wakelocks are gone, and now I'm testing G-Flex's 4.4 files.

So I'm asking, in case I'm missing something (or doing too much) what files are needed to completely port over wifi calling into another rom?
First learned on: HTC Glacier: myTouch 4G
Sold on swappa:T-Mobile Samsung Galaxy S II T989 + SGS3 T999L LTE
Current: T-Mo LG G2 D801