pw_rpc: Rename base_server_writer_test to responder_test

Also fix the order of dir_pw_transfer in modules.gni.

Change-Id: Id27e2cfe627b6af93db0722a6247c60ef0a290eb
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/49842
Pigweed-Auto-Submit: Wyatt Hepler <hepler@google.com>
Commit-Queue: Auto-Submit <auto-submit@pigweed.google.com.iam.gserviceaccount.com>
Reviewed-by: Alexei Frolov <frolv@google.com>
diff --git a/pw_rpc/BUILD.gn b/pw_rpc/BUILD.gn
index a1efb04..d5f4fd5 100644
--- a/pw_rpc/BUILD.gn
+++ b/pw_rpc/BUILD.gn
@@ -191,12 +191,12 @@
 pw_test_group("tests") {
   tests = [
     ":base_client_call_test",
-    ":base_server_writer_test",
     ":channel_test",
     ":client_test",
     ":client_server_test",
     ":ids_test",
     ":packet_test",
+    ":responder_test",
     ":server_test",
     ":service_test",
   ]
@@ -212,7 +212,7 @@
   visibility = [ "./*" ]
 }
 
-pw_test("base_server_writer_test") {
+pw_test("responder_test") {
   deps = [
     ":server",
     ":test_utils",