libbinder: Handle peer closing connection in Trusty

Fix the code handling incoming messages in RpcTransportTipcTrusty
to return DEAD_OBJECT if the peer closed the connection
instead of OK.

Bug: 230135749
Test: binderRpcTest on Trusty
Change-Id: I0ff50e31bd1823bcb568119887453f34c380c1d8
2 files changed