adds get/save-BodyFatPercentage and get/save-LeanBodyMass

Authorization status

Add unified way to get workouts with activity name/id, isTracked flag. Add listener for any changes

Added correct link to permissions.

Add bridge method for HKHealthStore.authorizationStatusForType to be
able to determine if user actually granted certain write permission.

See: https://developer.apple.com/documentation/healthkit/hkhealthstore/1614154-authorizationstatusfortype?language=objc