libbinder: modernize unique_fd&& -> unique_fd

The future can't wait!

Bug: N/A
Test: binderRpcTest
Change-Id: I74b041853b528f38e5bc55e8738ec399622cbf1a
diff --git a/libs/binder/RpcConnection.cpp b/libs/binder/RpcConnection.cpp
index ee5f508..fa228b2 100644
--- a/libs/binder/RpcConnection.cpp
+++ b/libs/binder/RpcConnection.cpp
@@ -406,14 +406,14 @@
     return true;
 }
 
-void RpcConnection::addClient(unique_fd&& fd) {
+void RpcConnection::addClient(unique_fd fd) {
     std::lock_guard<std::mutex> _l(mSocketMutex);
     sp<ConnectionSocket> connection = sp<ConnectionSocket>::make();
     connection->fd = std::move(fd);
     mClients.push_back(connection);
 }
 
-sp<RpcConnection::ConnectionSocket> RpcConnection::assignServerToThisThread(unique_fd&& fd) {
+sp<RpcConnection::ConnectionSocket> RpcConnection::assignServerToThisThread(unique_fd fd) {
     std::lock_guard<std::mutex> _l(mSocketMutex);
     sp<ConnectionSocket> connection = sp<ConnectionSocket>::make();
     connection->fd = std::move(fd);
diff --git a/libs/binder/include/binder/RpcConnection.h b/libs/binder/include/binder/RpcConnection.h
index 3a2d8e5..1b8f4b9 100644
--- a/libs/binder/include/binder/RpcConnection.h
+++ b/libs/binder/include/binder/RpcConnection.h
@@ -148,8 +148,8 @@
     bool setupSocketServer(const SocketAddress& address);
     bool setupSocketClient(const SocketAddress& address);
     bool setupOneSocketClient(const SocketAddress& address);
-    void addClient(base::unique_fd&& fd);
-    sp<ConnectionSocket> assignServerToThisThread(base::unique_fd&& fd);
+    void addClient(base::unique_fd fd);
+    sp<ConnectionSocket> assignServerToThisThread(base::unique_fd fd);
     bool removeServerSocket(const sp<ConnectionSocket>& socket);
 
     enum class SocketUse {