This moves over Julian's patch from the sloppy branch.

This is more in line with what other packages do.

Update to upstream version '3.38.1'
with Debian dir bd178f738ed72291a54d2aa8258423ff134794c4

(cherry picked from commit cbcb28f9)

(cherry picked from commit c33933b7)

Fixes https://gitlab.gnome.org/GNOME/gnome-contacts/-/issues/188

(cherry picked from commit d591157d)

When switching to libhandy 1.0, we accidentally broke the valadoc build,
since that tried looking for the `handy 0.0` package. Fix the custom
target to look for the correct one now.

Fixes https://gitlab.gnome.org/GNOME/gnome-contacts/-/issues/177

(cherry picked from commit 03efda10)

ContactsEditorProperty: Make sure the Postal Address EditorPropertyRow "is_empty" value is properly set

(cherry picked from commit 2f7daac6)

Update to upstream version '3.38'
with Debian dir b242a44d5545229c790c3e12c6a913fb5793afd3

It isn't needed anymore since libhandy 0.90.0.

The API is now stable.