Allow passing the underlying network to startLegacyVpn.

This will be used by a future change that makes the legacy
lockdown VPN pass the underlying network.

Bug: 173331190
Test: tests in subsequent CLs in stack
Change-Id: I09366a7f872ef3d4538962a75b0114a2ecb536e6
2 files changed
tree: fa03e5ab482543e927c196e38142e24f68158970
  1. core/
  2. framework/
  3. service/
  4. services/
  5. tests/
  6. OWNERS