var() only recalc when there's new UICommand, which is not correct.

[CGQAQ]

Affected version

main

Flutter versions

3.38.0

No same issues found.

• Yes, I search all issues but not found.

Steps to Reproduce

This page's animation is not in sync. highly likely due to var() not being recalculated when no new UICommand.setStyle is sent from the bridge side to the Dart side, and thus the Dart side did not recalculate var().

Code example

Expected results

var(..) should be recalculated whenever the dependency changes

Actual results

Animations have the same duration, but are not in sync.