Downgrade exceptions to warns for tests

While the real implementation doesn't actually use the methods in this
change when in the new configuration, old tests has race conditions that
have bad interactions with the tests. Until those tests can be fixed, we
can downgrade these exceptions to warnings only. This will stop test
failures.

Flag: EXEMPT, test only fix
Bug: 381114027
Test: atest com.android.bluetooth.pbapclient.PbapClientServiceTest
Change-Id: I2d61f6885a06b95b018188d04917406e35acfa62