Bug#1002725: evince: printing broken as apparmor denies access to pxgsettings

[Mike Ayers]

Under GNOME desktop evince will print for me in my testing system.

Under Cinnamon evince will hang when I bring up the print dialog.

The following patch seems to help:
--- /etc/apparmor.d/usr.bin.evince- 2021-11-21 13:03:23.000000000 -0500
+++ /etc/apparmor.d/usr.bin.evince    2021-12-29 11:26:26.187865562 -0500
@@ -67,6 +67,7 @@
    /usr/bin/pcmanfm Cx -> sanitized_helper,  # LXDE
    /usr/bin/krusader Cx -> sanitized_helper, # KDE
    /usr/bin/thunar Cx -> sanitized_helper,   # XFCE
+  /usr/lib/x86_64-linux-gnu/libproxy/0.4.17/pxgsettings Cx -> 
sanitized_helper, # Print Dialog

    # For Xubuntu to launch the browser
    #include <abstractions/exo-open>