NOTE:
- Needs latest firmware
- Setting to Japanese or Korean leads to empty menus on the device. When
reconnecting you, will get a sceen which telling you to update. I highly
suspect it requires flashing Mili_wuhan.ft.kj (kj=korean,japanese)
- Rename MiBand2Service to HuamiService
- Move preferences around (Mi Band 2 has its own device specific settings now)
- Fix Cor menu items not syncing immediately in settings
- Try to support settings menu items on Mi Band 3 (buggy, disabled code for now)