libradiocompat CallbackManager: add extra logging

These logs are aimed at resolving a race condition around
setResponseFunctions. To be removed or degraded once it's resolved.

Bug: 405830123
Test: build and lunch_cvd; grep logs against CallbackManager
Flag: EXEMPT logs only
Change-Id: I225ce12ba7047a852e71dd94eb0c23cdb4bd5bb1