added sync "steps" from PineTime/InfiniTime to Gadgetbridge.
notes:
* Steps sync works only since InfiniTime 1.7
* InfiniTime advertise "steps" info when the PineTime screen is ON (and a bit after that). hence:
* you should unlock the PineTime screen before end of the day to not loose your latest progress (since the last unlock) at the end of the day;
* when the PineTime screen is ON and you are moving, PineTime will send "steps" count every about 2-10 seconds, and Gadgetbridge may start to treat this data as an Activity (and also displaying it in Activity charts). that data and charts will not be accurate: you should wait for ["Health/Fitness data storage and expose to companion app](https://github.com/InfiniTimeOrg/InfiniTime/projects/4)" project to be implemented on the PineTime side. and meanwhile, in Gadgetbridge open "Device specific settings" and change/uncheck option in "Charts tabs" and "Activity info on device card" to leave only Steps data.
Reviewed-on: https://codeberg.org/Freeyourgadget/Gadgetbridge/pulls/2486
Co-authored-by: ITCactus <itcactus@noreply.codeberg.org>
Co-committed-by: ITCactus <itcactus@noreply.codeberg.org>
