This change adds basic tests for all IKEv2/IPsec VPN public APIs. Additional testing for ensuring IKEv2 setup completes will be done in a subsequent CL. Bug: 148582947 Test: Ikev2VpnTest added Change-Id: Ia5d35c32525b32be4a0dc0584630f5bb9e7f1bcb Merged-In: Ia5d35c32525b32be4a0dc0584630f5bb9e7f1bcb (cherry picked from commit 12f571feaea736de875aebef8ad0cc70630ad6ab)