[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_flags.aconfig b/services/surfaceflinger/surfaceflinger_flags.aconfig
index 6519d3a..bfc03aa 100644
--- a/services/surfaceflinger/surfaceflinger_flags.aconfig
+++ b/services/surfaceflinger/surfaceflinger_flags.aconfig
@@ -22,3 +22,11 @@
   description: "This flag controls minor miscellaneous SurfaceFlinger changes. Cannot be read before boot finished!"
   bug: "297389311"
 }
+
+flag {
+  name: "vrr_config"
+  namespace: "core_graphics"
+  description: "Controls SurfaceFlinger support for VRR Configurations"
+  bug: "284845445"
+  is_fixed_read_only: true
+}