binderRpcTest: named normal modes

Prevoiusly it was difficult to gtest_filter
for only the 'regular' tests - which is useful
for debugging issues interacting with kernel
binder.

Bug: N/A
Test: binderRpcTest
Change-Id: I943c885cb8a968d963a3c091e1930cc891dd790f
diff --git a/libs/binder/tests/binderRpcTest.cpp b/libs/binder/tests/binderRpcTest.cpp
index 6e34d25..407a791 100644
--- a/libs/binder/tests/binderRpcTest.cpp
+++ b/libs/binder/tests/binderRpcTest.cpp
@@ -237,9 +237,13 @@
             std::to_string(clientVersion) + "_serverV" + std::to_string(serverVersion);
     if (singleThreaded) {
         ret += "_single_threaded";
+    } else {
+        ret += "_multi_threaded";
     }
     if (noKernel) {
         ret += "_no_kernel";
+    } else {
+        ret += "_with_kernel";
     }
     return ret;
 }