RN: Re-enable useInsertionEffectsForAnimations (#48708)

Summary: Pull Request resolved: #48708 {D68171721} [#48678](#48678) mitigated the bug that necessitated this revert. Changelog: [General][Changed] - (Reapply) The `AnimatedNode` graph will not occur during the insertion effect phase, which means animations can now be reliably started during layout effects. Reviewed By: sammy-SC Differential Revision: D68217144 fbshipit-source-id: 6796440f2839d897158528642e07869951651327

Author: yungsters

packages/react-native/scripts/featureflags/ReactNativeFeatureFlags.config.js

@@ -627,13 +627,12 @@ const definitions: FeatureFlagDefinitions = {
  },
  },
  useInsertionEffectsForAnimations: {
- defaultValue: false,
+ defaultValue: true,
  metadata: {
- dateAdded: '2024-09-12',
  description:
  'Changes construction of the animation graph to `useInsertionEffect` instead of `useLayoutEffect`.',
  expectedReleaseValue: true,
- purpose: 'experimentation',
+ purpose: 'release',
  },
  },
  useRefsForTextInputState: {

packages/react-native/src/private/featureflags/ReactNativeFeatureFlags.js

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<a88e25ee1e5bb8a324ff861c0703b9aa>>
+ * @generated SignedSource<<b7909873b5a9f72390db3a451f719b83>>
  * @flow strict
  */
 
@@ -177,7 +177,7 @@ export const shouldUseSetNativePropsInFabric: Getter<boolean> = createJavaScript
 /**
  * Changes construction of the animation graph to `useInsertionEffect` instead of `useLayoutEffect`.
  */
-export const useInsertionEffectsForAnimations: Getter<boolean> = createJavaScriptFlagGetter('useInsertionEffectsForAnimations', false);
+export const useInsertionEffectsForAnimations: Getter<boolean> = createJavaScriptFlagGetter('useInsertionEffectsForAnimations', true);
 
 /**
  * Enable a variant of TextInput that moves some state to refs to avoid unnecessary re-renders