SF: Updating text on threads/source in order to easier read the systrace.

Test: SF tests Pass.
Change-Id: Id7b88e2559a7ec95dcd6c26bf43a143401cde653
diff --git a/services/surfaceflinger/tests/unittests/SchedulerTest.cpp b/services/surfaceflinger/tests/unittests/SchedulerTest.cpp
index c809e82..df0d982 100644
--- a/services/surfaceflinger/tests/unittests/SchedulerTest.cpp
+++ b/services/surfaceflinger/tests/unittests/SchedulerTest.cpp
@@ -40,7 +40,7 @@
               : mEventThread(std::move(eventThread)) {}
 
         std::unique_ptr<EventThread> makeEventThread(
-                const char* /* connectionName */, DispSync* /* dispSync */,
+                const std::string& /* connectionName */, DispSync* /* dispSync */,
                 nsecs_t /* phaseOffsetNs */,
                 impl::EventThread::ResyncWithRateLimitCallback /* resyncCallback */,
                 impl::EventThread::InterceptVSyncsCallback /* interceptCallback */) override {