Apply suggested fixes from PR

apparmor.d/profiles-m-r/pkttyagent

@@ -11,6 +11,7 @@ include <tunables/global>
 profile pkttyagent @{exec_path} {
   include <abstractions/base>
   include <abstractions/dbus-strict>
+  include <abstractions/nameservice-strict>
 
   capability sys_nice,
   capability audit_write,
@@ -36,9 +37,6 @@ profile pkttyagent @{exec_path} {
 
   @{exec_path} mr,
 
-  /etc/nsswitch.conf r,
-  /etc/passwd r,
-
   owner @{PROC}/@{pids}/stat r,
 
   /dev/tty rw,