Merge Add fcitx5 dbus interface to fcitx abstraction

Similar reference in snapd https://github.com/snapcore/snapd/pull/12924

Reference upstream implementation: 

https://github.com/fcitx/fcitx/blob/master/src/frontend/ipcportal/ipcportal.h
https://github.com/fcitx/fcitx5/blob/master/src/frontend/dbusfrontend/dbusfrontend.cpp

MR: https://gitlab.com/apparmor/apparmor/-/merge_requests/1222
Approved-by: Georgia Garcia <georgia.garcia@canonical.com>
Merged-by: Georgia Garcia <georgia.garcia@canonical.com>

profiles/apparmor.d/abstractions/fcitx-strict

@@ -22,5 +22,18 @@
 
   owner @{HOME}/.config/fcitx/dbus/* r,
 
+  # Allow access to the Fcitx portal, supported by fcitx/fcitx5
+  dbus (send)
+      bus=session
+      path=/{,org/freedesktop/portal/}inputmethod
+      interface=org.fcitx.Fcitx.InputMethod1
+      member={CreateInputContext,Version}
+      peer=(name=org.freedesktop.portal.Fcitx),
+
+  dbus (send, receive)
+      bus=session
+      path=/{,org/freedesktop/portal/}inputcontext/**
+      interface=org.fcitx.Fcitx.InputContext1,
+
   # Include additions to the abstraction
   include if exists <abstractions/fcitx-strict.d>