onclite: Enable ipsec_tunnel feature

Fixed : CTS issue due to ipsec_tunnel feature.

CTS issues are showing failure on devices with first_api_level set to
29 . With this api level certain test cases which weren't executing
till now begin executing. Ex: android.net.cts.IpSecManagerTunnelTest.

These tests mandatorily requrire ipsec_tunnel feature to be enabled.

Change-Id: If52b652ac3cc6488fefcf851527f224efa03e7eb