[Android] Add device serial to all host_controller log messages.

tools/android/forwarder2/host_forwarder_main.cc

Index: tools/android/forwarder2/host_forwarder_main.cc
diff --git a/tools/android/forwarder2/host_forwarder_main.cc b/tools/android/forwarder2/host_forwarder_main.cc
index 33fc99610eefd2aa410e1ef3a5253d9344c2c87d..25bbfa7b405b17fdfd530a5319168ce65ccc0ab1 100644
--- a/tools/android/forwarder2/host_forwarder_main.cc
+++ b/tools/android/forwarder2/host_forwarder_main.cc
@@ -199,7 +199,7 @@ class HostControllersManager {
     }
     // Create a new host controller.
     std::unique_ptr<HostController> host_controller(HostController::Create(
-        device_port, host_port, adb_port, GetExitNotifierFD(),
+        device_serial, device_port, host_port, adb_port, GetExitNotifierFD(),
         base::Bind(&HostControllersManager::DeleteHostController,
                    weak_ptr_factory_.GetWeakPtr())));
     if (!host_controller.get()) {