trigger animations at time 0 in fantom (#51776)

Summary:
Pull Request resolved: #51776

changelog: [internal]

testing animation must be predictable.
When animation takes 1 second and test calls `unstable_advanceAnimationsByTime(1000)`, the expectation is that the animation would have completed.
Previously it was necessary to wait for at least 38ms over the time it took to complete animation. This diff reduces the delta to 22ms.

Reviewed By: andrewdacenko

Differential Revision: D75813087

fbshipit-source-id: 1a27e5c227a0f3f1183ebdf41dc8c18149d68be0

Author: sammy-SC

packages/react-native/Libraries/Animated/__tests__/Animated-itest.js

@@ -61,8 +61,8 @@ test('moving box by 100 points', () => {
     }).start();
   });
 
-  // TODO: this fails with any value below 1038, even though anything above 1000 should be enough.
-  Fantom.unstable_advanceAnimationsByTime(1038);
+  // TODO: this fails with any value below 1022, even though anything above 1000 should be enough.
+  Fantom.unstable_advanceAnimationsByTime(1022);
   boundingClientRect = viewElement.getBoundingClientRect();
   expect(boundingClientRect.x).toBe(100);