Fix Vsync Via Compositor causing halved refresh rate when vsync is forced by the graphics driver
Created by: hoontee
Reverts commit 52f44e72b61a8e9e923454bacdcf62de1b1c6309.
Add check to prevent compositor sync if the graphics driver is forcing vsync.
Fixes #35038 (closed).
(Addendum: this PR does not negatively impact users unaffected by #35038 (closed).)