libbinder: RPC avoid copy of transaction data

The socket code here needs a lot more optimization/analysis, but using
setIpcDataReference here is important so that we know internally whether
a Parcel is owned or not. This will allow for stronger checks in markFor*
functions which control the Parcel format.

Bug: 167966510
Test: binderRpcTest
Change-Id: Id2b0fc02972936f3e3b7382e7b56f7631a621e97