/usr/include/evolution-data-server-3.2/libecal/ is in libecal1.2-dev 3.2.3-0ubuntu6.
This file is owned by root:root, with mode 0o755.
..
/usr/include/evolution-data-server-3.2/libecal/e-cal-check-timezones.h
/usr/include/evolution-data-server-3.2/libecal/e-cal-client-view.h
/usr/include/evolution-data-server-3.2/libecal/e-cal-client.h
/usr/include/evolution-data-server-3.2/libecal/e-cal-component.h
/usr/include/evolution-data-server-3.2/libecal/e-cal-recur.h
/usr/include/evolution-data-server-3.2/libecal/e-cal-system-timezone.h
/usr/include/evolution-data-server-3.2/libecal/e-cal-time-util.h
/usr/include/evolution-data-server-3.2/libecal/e-cal-types.h
/usr/include/evolution-data-server-3.2/libecal/e-cal-util.h
/usr/include/evolution-data-server-3.2/libecal/e-cal-view.h
/usr/include/evolution-data-server-3.2/libecal/e-cal.h