Add ARP offload for APFv6 multi-devices tests

Test: m connectivity_multi_devices_snippet && atest CtsConnectivityMultiDevicesTestCases
Change-Id: I32dae14d3bd6400ff47cc545410242f2ccd8f1ab
diff --git a/tests/cts/multidevices/run_tests.py b/tests/cts/multidevices/run_tests.py
index 1391d13..a0d0bec 100644
--- a/tests/cts/multidevices/run_tests.py
+++ b/tests/cts/multidevices/run_tests.py
@@ -16,6 +16,7 @@
 
 import sys
 from apfv4_test import ApfV4Test
+from apfv6_test import ApfV6Test
 from connectivity_multi_devices_test import ConnectivityMultiDevicesTest
 from mobly import suite_runner
 
@@ -35,4 +36,4 @@
     index = sys.argv.index("--")
     sys.argv = sys.argv[:1] + sys.argv[index + 1 :]
   # TODO: make the tests can be executed without manually list classes.
-  suite_runner.run_suite([ConnectivityMultiDevicesTest, ApfV4Test], sys.argv)
+  suite_runner.run_suite([ConnectivityMultiDevicesTest, ApfV4Test, ApfV6Test], sys.argv)