[automerger skipped] Merge "Remove the usage of NETID_UNSET from Vpn.java" am: cf1dc9f287 am: e648a78c15 am: f08c2ce8a9 -s ours

am skip reason: skip tag Change-Id I69d449705b1dc541287c72af8dc7705dc4733109 with SHA-1 2cc371c74b is already in history

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1653929

Change-Id: I02ac63b20048a4c91a821911c4db0b14805bdef3