Remove the reference of new Network(int) in Vpn.java

Test: atest FrameworksNetTests
Bug: 182963397
Merged-In: I4176dd1298ad8d8e8407eb95b2e6cbb8faf4bc17
Change-Id: I4176dd1298ad8d8e8407eb95b2e6cbb8faf4bc17
  (cherry-picked from ag/13959430)
1 file changed