Add a test for startProvisionedVpnProfileSession() am: b11c913109 am: 12062d5ae1 am: bbd24de7c6

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

Change-Id: I101171753035b4dea63b465c9411c512f4f100e2
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>