Add linkToDeath support for RPC binder so a client can act on disconnect

This requires an incoming thread to be listening to the connection in
order to be notified.

Test: atest binderRpcTest
Test: atest binderRpcTestSingleThreaded
Bug: 182939380
Change-Id: I3746de6e8cff99bb267867c5dc60a6815b19fb92
5 files changed