improvement: add correspondence key to data

fix: device information

fix: device information

feature: add device brand, model

fix: init data values

improvement: push data to the server only if there is data to push an…

…d clear their data

improvement: push data to the server only if there is data to push

improvement: send last acceleration data to the backend while stoppin…

…g listening new events

fix: remove Serializable implementation from Rest models

Merge remote-tracking branch 'github/master'

# Conflicts:
#	ridesafe-lib-android/src/main/kotlin/io/ridesafe/android/services/ActivityRecordService.kt