Remove LegacyVpnRunner am: 4fa38a5caa

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/2727694

Change-Id: Ib2348afb02638f64144fd7989b24b25ee5b3ad61
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>