Add a test for startProvisionedVpnProfileSession() am: b11c913109 am: 8dc4a2b14d

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

Change-Id: I5a58a1b1a80617453af27455002c5fafeb12c16c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>