CsipSetCoordinatorServiceTest: Fix flaky tests caused by call after teardown

These two tests are fix with this patch:
- testOutgoingConnectExistingUuid
- testDump_doesNotCrash

They caused false negative on other tests

Bug: 324702156
Test: atest CsipSetCoordinatorServiceTest --rerun-until-failure
Flag: Exempt, unit test flaky fix
Change-Id: I611fec3bf6a42dfc972a10fd84dfcef94cccaa1d