binder: RpcTranpsortCtx::newTransport Add FdTrigger arg.

For TLS, creating a new RpcTransport object may require I/O.
Make them interruptable by providing an FdTrigger argument.

Test: binderRpcTest
Bug: 190868302

Change-Id: I63a6655f50d1b2fa5a484860ec422021e88de3e5
4 files changed