Improve logging in ManagedServices

* The value of "service.asBinder()" should be stable in calls to checkServiceTokenLocked() coming from the same NLS (it's a candidate key in mServices), whereas "service" itself is different every time.
* Specify which service died in binderDied().
* Log skipped rebinding.

Bug: 359126464
Test: N/A
Flag: EXEMPT Trivial logging change
Change-Id: I43ccf3407d2be690885d9bee410cf1560bde5736