Add TrustManagerServiceTest to postsubmit

This test is in neither presubmit nor postsubmit.  It should be in
presubmit, but add it to postsubmit as a first step.

Bug: 296464083
Test: N/A
Change-Id: I6453d92fea76efab6554e4315cf9f38d84e8e072
1 file changed