Re-enable HostsideVpnTests on presubmit

Some tests were disabled by aosp/2676836 since these tests were flaky
(b/291701394).
b/291701394 was fixed. So, this CL re-enables them on presubmit.

Bug: 291701394
Bug: 342557183
Test: VpnTest --iterations 10
Change-Id: I299dd0dfd7d6cbdea2ad97477b5613c78af421e1
1 file changed