hk: update 3HK

This patch updates the APN settings for 3HK:
- The carrier name is stylized as "3", instead of "Three".
- Mark APN "mobile.three.com.hk" for 3G
- Add APN "mobile.lte.three.com.hk" for 4G LTE

Ref: https://www.three.com.hk/website/appmanager/three/home?_nfpb=true&_pageLabel=P200470391219567710594&lang=eng&pageid=b34704

https://bugzilla.gnome.org/show_bug.cgi?id=783341