Merge "Revert "Revert "Revert "Add VpnServiceBuilderShim for VpnService..."" am: 7178c3dc33

Original change: https://android-review.googlesource.com/c/platform/packages/modules/NetworkStack/+/1941193

Change-Id: I47d2d409b218b6ae52b9469f26b1aded23c2c7e9