Add support for S800 including additional body sensor measurements

[spelzl]

Please add support for the S800 including the additional body sensor measurements.

[spelzl]

Does thishelp in any way to progress the implementation of the S800 into the Mi-Scale add-on?

[spelzl]

[spelzl]

Does this Bluetooth Log help to add the Mija S800?

btsnoop_hci.log.zip