[SF] Add flag vrr_config
This supports SurfaceFlinger running at divisor rates of
VRR vsyncRate

Test: m
BUG: 284845445
Change-Id: Ia1fc332df137eab16003828991258cf7003bb392
diff --git a/services/surfaceflinger/SurfaceFlinger.h b/services/surfaceflinger/SurfaceFlinger.h
index e22dd56..ef6b815 100644
--- a/services/surfaceflinger/SurfaceFlinger.h
+++ b/services/surfaceflinger/SurfaceFlinger.h
@@ -1457,6 +1457,7 @@
     bool mConnectedDisplayFlagValue;
     bool mMisc2FlagEarlyBootValue;
     bool mMisc2FlagLateBootValue;
+    bool mVrrConfigFlagValue;
 };
 
 class SurfaceComposerAIDL : public gui::BnSurfaceComposer {