Cert tests for LE Secure Connections Just Works PTS cases

Implementation of:
SM/MAS/SCJW/BV-01-C
SM/SLA/SCJW/BV-02-C
SM/SLA/SCJW/BV-03-C
SM/MAS/SCJW/BV-04-C

Tag: #gd-refactor
Bug: 155399771
Test: gd/cert/run --host --test_filter=LeSecurityTest
Change-Id: I2de9d4de240d63f8bcd80afde86637c56439ac90