libbinder: switch sockaddr to byte array in RpcServer

A few methods in RpcServer.cpp take a sockaddr or
sockaddr_storage parameter. To support operating systems
without sockets, e.g. Trusty, this switches those
types to void* and std::array<uint8_t, 128>, respectively.

Test: atest binderRpcTest
Bug: 224644083
Change-Id: I9773a4cf0aedd5ebec22a10cea5b1593067632c5