remote-access-handle: Expose disable-animations property

Set to TRUE if a screen cast session asked for animations to be
disabled.

https://gitlab.gnome.org/GNOME/mutter/merge_requests/838

src/backends/meta-screen-cast-session.c

@@ -91,6 +91,10 @@ init_remote_access_handle (MetaScreenCastSession *session)
 
   remote_access_controller = meta_backend_get_remote_access_controller (backend);
   remote_access_handle = META_REMOTE_ACCESS_HANDLE (session->handle);
+
+  meta_remote_access_handle_set_disable_animations (remote_access_handle,
+                                                    session->disable_animations);
+
   meta_remote_access_controller_notify_new_handle (remote_access_controller,
                                                    remote_access_handle);
 }