Add API to initialize storage state
Add API to initialize storage state

Signed-off-by: Anton Gerasimov <277b60feaa2697e7cd751a53eba0accb87fdfaba@here.com>

advancedtelematic/aktualizr,advancedtelematic/aktualizr,advancedtelematic/aktualizr,advancedtelematic/aktualizr,advancedtelematic/sota_client_cpp,advancedtelematic/sota_client_cpp