[obex] PBAP for Sailfish

WIP
[obex] PBAP for Sailfish

WIP, combined calls
[obex] PBAP for Sailfish

WIP, PBAP session connect/disconnect notification
[obex] PBAP for Sailfish

WIP single service name
[obex] PBAP for Sailfish

Missed calls handling
[obex] PBAP for Sailfish

WIP fix memleak
[obex] PBAP for Sailfish

WIP: vCard property filtering.
[obex] PBAP for Sailfish

WIP Fixed request with filtering
[obex] PBAP for Sailfish

WIP revert unnecessary changes
[obex] PBAP for Sailfish

Endianness fix.
[obex] PBAP for Sailfish

WIP D-Bus service name change.
[obex] PBAP for Sailfish. Fixes JB#8693, JB#15864, JB#15912, JB#15296

PBAP backend for retrieving contacts and call history data over
Jolla D-Bus interface.