Merge "Add a test for starting the legacy VPN." am: 869d4f597d am: 6926df6314 am: 4136a41652 am: 4d64450516

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1372896

Change-Id: I82638711fc39d6d29d618d7a1732351dbbaf780b