SF: kernel idle timer is not applicable for VRR

Bug: 356061399
Change-Id: I784de91ae8bd4202e2e3dfe4bdb3d21e6779abd4
Test: Sysui perf test from bug
Flag: EXEMPT bugfix
diff --git a/services/surfaceflinger/Scheduler/VSyncReactor.cpp b/services/surfaceflinger/Scheduler/VSyncReactor.cpp
index 2455822..b974cd2 100644
--- a/services/surfaceflinger/Scheduler/VSyncReactor.cpp
+++ b/services/surfaceflinger/Scheduler/VSyncReactor.cpp
@@ -140,7 +140,9 @@
     std::lock_guard lock(mMutex);
     mLastHwVsync.reset();
 
-    if (!mSupportKernelIdleTimer && mTracker.isCurrentMode(modePtr) && !force) {
+    // kernel idle timer is not applicable for VRR
+    const bool supportKernelIdleTimer = mSupportKernelIdleTimer && !modePtr->getVrrConfig();
+    if (!supportKernelIdleTimer && mTracker.isCurrentMode(modePtr) && !force) {
         endPeriodTransition();
         setIgnorePresentFencesInternal(false);
         mMoreSamplesNeeded = false;