Add a test for startProvisionedVpnProfileSession() am: b11c913109

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/1906325

Change-Id: I59f1abbac22bdb407ae7fe040eda1951bc5c591e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>