SF: Rename VsyncModulator

Adopt Vsync/vsync spelling over the awkward and less common VSync/vSync.

Bug: 160012986
Test: Build
Change-Id: Ibe230906e969d2ef8100ca7b1f5650dfe227c927
diff --git a/services/surfaceflinger/Scheduler/PhaseOffsets.h b/services/surfaceflinger/Scheduler/PhaseOffsets.h
index 9ec6d56..e395b42 100644
--- a/services/surfaceflinger/Scheduler/PhaseOffsets.h
+++ b/services/surfaceflinger/Scheduler/PhaseOffsets.h
@@ -19,7 +19,7 @@
 #include <unordered_map>
 
 #include "RefreshRateConfigs.h"
-#include "VSyncModulator.h"
+#include "VsyncModulator.h"
 
 namespace android::scheduler {