SF: improve activeMode log in dumpsys

Test: adb shell dumpsys SurfaceFlinger
Change-Id: I06a03d3ce841ac18aad70c2945bdb75885fb8f50
diff --git a/services/surfaceflinger/Scheduler/RefreshRateSelector.cpp b/services/surfaceflinger/Scheduler/RefreshRateSelector.cpp
index a37fb96..2c66492 100644
--- a/services/surfaceflinger/Scheduler/RefreshRateSelector.cpp
+++ b/services/surfaceflinger/Scheduler/RefreshRateSelector.cpp
@@ -1590,7 +1590,8 @@
     std::lock_guard lock(mLock);
 
     const auto activeMode = getActiveModeLocked();
-    dumper.dump("activeMode"sv, to_string(activeMode));
+    dumper.dump("renderRate"sv, to_string(activeMode.fps));
+    dumper.dump("activeMode"sv, to_string(*activeMode.modePtr));
 
     dumper.dump("displayModes"sv);
     {