Helper function needed for fixing TD.4.7.4 and TEST.PD.PROT.SRC.10 PR_Swap while having contamiant detection enabled. tcpm_is_toggling returns true when a DRP port is in one of the toggling states. Bug: 169213252 Bug: 174094095 Signed-off-by: Badhri Jagan Sridharan <badhri@google.com> Change-Id: Ie3837c3067fd91f3e9ea4afdfc1d5c7bf44659de