[SF] Use render rate for the compositorTiming

Vsync Period does not represent the actual
composition rate in the framework anymore,
render rate is the more accurate composition rate.

BUG: 383938139
BUG: 355342197
Flag: EXEMPT bug fix
Test: atest CtsDeqpTestCases --test-filter '*dEQP-EGL.functional.get_frame_timestamps*'
Test: Before fix http://ab/I51300010353712246
Test: After the fix http://ab/I22500010354940353
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:6b6d542c5c002e2247aacdb1aec79868c0c4a809)
Merged-In: I33574b3ff347264a19e2e0bcfd2236639aad01a5
Change-Id: I33574b3ff347264a19e2e0bcfd2236639aad01a5

Author: ramindani

services/surfaceflinger/SurfaceFlinger.cpp

@@ -3171,12 +3171,12 @@ void SurfaceFlinger::onCompositionPresented(PhysicalDisplayId pacesetterId,
 
     const auto schedule = mScheduler->getVsyncSchedule();
     const TimePoint vsyncDeadline = schedule->vsyncDeadlineAfter(presentTime);
-    const Period vsyncPeriod = schedule->period();
+    const Fps renderRate = pacesetterDisplay->refreshRateSelector().getActiveMode().fps;
     const nsecs_t vsyncPhase =
             mScheduler->getVsyncConfiguration().getCurrentConfigs().late.sfOffset;
 
-    const CompositorTiming compositorTiming(vsyncDeadline.ns(), vsyncPeriod.ns(), vsyncPhase,
-                                            presentLatency.ns());
+    const CompositorTiming compositorTiming(vsyncDeadline.ns(), renderRate.getPeriodNsecs(),
+                                            vsyncPhase, presentLatency.ns());
 
     ui::DisplayMap<ui::LayerStack, const DisplayDevice*> layerStackToDisplay;
     {