This change removes the requirement for IPsec interfaces to be
point-to-point. The two implementations (VTI vs XFRMI) have different
point-to-point values, and as such, this assertion is no longer valid.
Bug: 126578549
Test: Ran tests against XFRM-I kernels
Change-Id: I0597e0aa86ccea2cd28d7c5e02063c788ddb08b8