* Add new async virtual method init_current_storages to MMIfaceModemMessaging * Add logic of init_current_storages to MMBroadbandModem * Add step "INIT_CURRENT_STORAGES" in MMIfaceModemMessaging initialization in order to load and store current SMS storages for mem1 and mem2. * Add usage of current sms storage value for mem1 in place of an empty string parameter when the command AT+CPMS is used. https://bugs.freedesktop.org/show_bug.cgi?id=93135