feat(android): add unstable_Immediate UpdateMode for synchronous state updates

[intergalacticspacehighway]

Summary:

Currently we support unstable_Immediate mode on updateState for iOS. This allows us to dispatch synchronous shadow node size updates in Expo UI SwiftUI (communicating SwiftUI children size to Yoga. Host for more details).

Since it is not enabled on android, it leads to layout shift when mixing Compose and React Native components as Compose tree currently dispatches size information asynchronously to the shadow node.

Here, the video demonstrates the asynchronous vs synchronous updateState usage (before and after applying the changes in this PR). Repro link

Screen.Recording.2026-04-02.at.8.52.27.PM.mov

More:

After enabling the update_immediate, I noticed the flicker was still happening. The issue is that update layout instruction triggers a follow up instruction when we set the shadow node size from Expo UI which gets skipped to the next frame. This is handled on iOS using _followUpTransactionRequired flag here. This seems to be added on iOS for similar reasons here when dispatching an instruction can lead to a follow-up instruction when synchronous update is triggered. So we also handle the sync follow up transaction in this PR using similar approach to iOS's.

Changelog:

[ANDROID] [ADDED] - Add unstable_Immediate UpdateMode support in updateState.

Test Plan:

Tested the changes in the repro. Also tested RN Tester, it should be a non breaking change.

[github-actions]

Warning

JavaScript API change detected

This PR commits an update to ReactNativeApi.d.ts, indicating a change to React Native's public JavaScript API.

• Please include a clear changelog message.
• This change will be subject to additional review.

This change was flagged as: POTENTIALLY_BREAKING