Fix tests that failed on devices without IPsec tunnel feature

Three tests failed when they try to set up IKE Session with a
tunnel mode Child SA and the device does not have ipsec tunnel
feature. This commit changed these tests to set up IKE Session
with a transport mode SA because 1) the logic these tests are
verifying is unrelated to the Child SA type and 2) using
transport mode make sure these tests run on all the devices.

Bug: 158268209
Test: CtsIkeTestCases, verified on taimen
Change-Id: I9a8c7f631f0e6e02492816e3fbf0d751017dc2b3
Merged-In: I9a8c7f631f0e6e02492816e3fbf0d751017dc2b3
(cherry picked from commit 0224324097f36106dfb7eccad3325024403e0381)
2 files changed