Verify carrier privileges for VCN-providing packages

This change adds and verifies packages in the VcnManagmentService,
ensuring that carrier privilege gain/loss correctly starts/tears down
VCN instances.

Bug: 163431877
Test: atest FrameworksNetTests
Change-Id: I63203188c57fdde1cfc58aaf1108aa3e70eb4a50
8 files changed