Correct the namespace of DeviceConfig in VpnTest am: d64b2b1bdd am: e8889a4589

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2629811

Change-Id: I3394704b7347ab265d02bab1822c9c14c6cb2ac5
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>