sharing: Enable settings widget for gnome-remote-desktop

Enable support for manipulating GNOME Remote Desktop settings. Settings
are done via the org.gnome.desktop.remote-desktop.vnc schema.
Configuring the VNC password is done via libsecret, thus libsecret is
added as a dependency.
8 jobs for wip/gnome-remote-desktop
Status Job ID Name Coverage
  Build
passed #61229
build

00:02:07

canceled #61195
build

canceled #61227
build

canceled #61178
build

 
  Test
passed #61181
asan

00:01:57

passed #61180
coverage

00:02:19

passed #61179
test

00:00:55

 
  Delivery
manual #61182
allowed to fail manual
packaging