Add dbus-network-manager-strict abstraction

Some applications queries network configuration (using
QNetworkConfigurationManager class in Qt and similar), and that produces
DBus denials under AppArmor confinement when NetworkManager backend is
used.

Add abstraction that allows most common read-only DBus queries for
getting current network configuration from NetworkManager backend.

profiles/apparmor.d/abstractions/dbus-network-manager-strict

@@ -0,0 +1,44 @@
+# vim:syntax=apparmor
+
+  dbus send
+       bus=system
+       path=/org/freedesktop/NetworkManager
+       interface=org.freedesktop.DBus.Properties
+       member=GetAll
+       peer=(name=org.freedesktop.NetworkManager),
+
+  dbus send
+       bus=system
+       path=/org/freedesktop/NetworkManager
+       interface=org.freedesktop.NetworkManager
+       member=GetDevices
+       peer=(name=org.freedesktop.NetworkManager),
+
+  dbus send
+       bus=system
+       path=/org/freedesktop/NetworkManager/ActiveConnection/[0-9]*
+       interface=org.freedesktop.DBus.Properties
+       member=GetAll
+       peer=(name=org.freedesktop.NetworkManager),
+
+  dbus send
+       bus=system
+       path=/org/freedesktop/NetworkManager/Devices/[0-9]*
+       interface=org.freedesktop.DBus.Properties
+       member=GetAll
+       peer=(name=org.freedesktop.NetworkManager),
+
+  dbus send
+       bus=system
+       path=/org/freedesktop/NetworkManager/Settings
+       interface=org.freedesktop.NetworkManager.Settings
+       member={GetDevices,ListConnections}
+       peer=(name=org.freedesktop.NetworkManager),
+
+  dbus send
+       bus=system
+       path=/org/freedesktop/NetworkManager/Settings/[0-9]*
+       interface=org.freedesktop.NetworkManager.Settings.Connection
+       member=GetSettings
+       peer=(name=org.freedesktop.NetworkManager),
+