eaa5fe4b74
If we're not running with a transaction then we don't need to block on waitUntilScheduled on any platform. I think this should always work, as the problems we had before were due to always using drawable present. But this helper method schedules the drawable presentation after the cmd buffer is scheduled - which is what we're doing with waitUntilScheduled anyway - just non blocking from our perspective. Fixes https://github.com/flutter/flutter/issues/131520
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