connman-pan-network-access: Depend on chaiwala-tests

The test uses `/usr/lib/chaiwala-tests/bluez/simple-agent` shipped in
the `chaiwala-tests` package, let's explicitly depend on it.

Signed-off-by: Emanuele Aina <emanuele.aina@collabora.com>

test-cases/connman-pan-network-access.yaml

@@ -24,7 +24,7 @@ metadata:
     - "A phone supporting PAN NAP. A computer can also be used to share its
        internet connection."
 
-  macro_install_packages_preconditions: apertis-tests python3-dbus python3-gi
+  macro_install_packages_preconditions: apertis-tests chaiwala-tests python3-dbus python3-gi
   pre-conditions:
     - "Make sure an Internet connection is active on the phone and can be shared.
        The steps are phone specific."