Include IkeTunnelConnectionParams in #hashCode and #equals

This commit includes IkeTunnelConnectionParams in
VcnGatewayConnectionConfig#hashCode and
VcnGatewayConnectionConfig#equals.

This commit fixes the issue that VcnGatewayConnection was not
being restarted as expected.

Bug: 191317512
Test: atest FrameworksVcnTests (new tests added)
Test: atest CtsVcnTestCases
Original-Change: https://android-review.googlesource.com/1742657
Merged-In: I70182f9b645e55eced1e0a048a1bd87778c1c0f6
Change-Id: I70182f9b645e55eced1e0a048a1bd87778c1c0f6