SF: remove usage of eVsyncSourceSurfaceFlinger

Bug: 162235855
Change-Id: I8326ce03fd3f6f007defe1487f2925164a679827
Test: presubmit
diff --git a/services/surfaceflinger/surfaceflinger_flags_new.aconfig b/services/surfaceflinger/surfaceflinger_flags_new.aconfig
index 0b9fd58..4a60987 100644
--- a/services/surfaceflinger/surfaceflinger_flags_new.aconfig
+++ b/services/surfaceflinger/surfaceflinger_flags_new.aconfig
@@ -21,6 +21,17 @@
   }
  } # ce_fence_promise
 
+ flag {
+  name: "deprecate_vsync_sf"
+  namespace: "core_graphics"
+  description: "Depracate eVsyncSourceSurfaceFlinger and use vsync_app everywhere"
+  bug: "162235855"
+  is_fixed_read_only: true
+  metadata {
+    purpose: PURPOSE_BUGFIX
+  }
+} # deprecate_vsync_sf
+
 flag {
   name: "frame_rate_category_mrr"
   namespace: "core_graphics"