Stop leaking this from BinderServerTransport's ctor

[jdcormie]

Accomplish this by splitting out the linkToDeath() part of setOutgoingBinder().

Also add a test for the DOA case and document why ignoring errors from linkToDeath() is ok.

[ejona86]

Why not change BinderServer?

          BinderServerTransport transport =
              new BinderServerTransport(...);
          transport.setOutgoingBinder(callbackBinder, executor);
          transprot.start(listener.transportCreated(transport));

(Alternatively, create a factory method to call instead of the constructor.)

[jdcormie]

(Alternatively, create a factory method to call instead of the constructor.)

done