[Android] Timers do not run when using HeadlessJsTaskService

Description

Hello!

I noticed that when using HeadlessJsTaskService, the timers do not run as expected. I did some investigations and I found out that React Native uses Android's Choreographer to schedule the timers.
I am testing the app on a real device: Samsung Galaxy S22 Ultra.
Apparently, Samsung's OneUI pauses the Choreographer when the app goes into background.
In order to fix this, React Native should use another technique to get "ticks", like a Handler or something, at least for the timers (I saw UI events are also processed using Choreographer).

Steps to reproduce

1. Install the application using "yarn android"
2. Open up Android Studio with Logcat open
3. Wait for the background service to start
4. Put the app in foreground by going on the home screen
5. Look in the logs and wait for the line with "CoreRune.SYSPERF_ACTIVE_APP_BBA_ENABLE : stop animation in background states"

React Native Version

0.84.1

Affected Platforms

Runtime - Android

Output of npx @react-native-community/cli info

System:
  OS: macOS 26.3.1
  CPU: (14) arm64 Apple M3 Max
  Memory: 160.17 MB / 36.00 GB
  Shell:
    version: "5.9"
    path: /bin/zsh
Binaries:
  Node:
    version: 22.13.1
    path: /Users/george/.nvm/versions/node/v22.13.1/bin/node
  Yarn:
    version: 3.6.4
    path: /Users/george/.nvm/versions/node/v22.13.1/bin/yarn
  npm:
    version: 10.9.2
    path: /Users/george/.nvm/versions/node/v22.13.1/bin/npm
  Watchman:
    version: 2025.05.26.00
    path: /opt/homebrew/bin/watchman
Managers:
  CocoaPods:
    version: 1.16.2
    path: /Users/george/.rvm/gems/ruby-3.0.0/bin/pod
SDKs:
  iOS SDK:
    Platforms:
      - DriverKit 25.0
      - iOS 26.0
      - macOS 26.0
      - tvOS 26.0
      - visionOS 26.0
      - watchOS 26.0
  Android SDK:
    API Levels:
      - "30"
      - "31"
      - "33"
      - "34"
      - "35"
      - "36"
      - "36"
    Build Tools:
      - 30.0.2
      - 30.0.3
      - 33.0.0
      - 34.0.0
      - 35.0.0
      - 36.0.0
      - 36.0.0
    System Images:
      - android-34 | Android TV ARM 64 v8a
      - android-35 | ARM 64 v8a
      - android-35 | Google Play ARM 64 v8a
      - android-35 | Google Play Tablet ARM 64 v8a
      - android-36 | Google Play ARM 64 v8a
      - android-36 | Pre-Release 16 KB Page Size Google Play ARM 64 v8a
    Android NDK: Not Found
IDEs:
  Android Studio: 2025.3 AI-253.30387.90.2532.14935130
  Xcode:
    version: 26.0.1/17A400
    path: /usr/bin/xcodebuild
Languages:
  Java:
    version: 17.0.13
    path: /usr/bin/javac
  Ruby:
    version: 3.0.0
    path: /Users/george/.rvm/rubies/ruby-3.0.0/bin/ruby
npmPackages:
  "@react-native-community/cli":
    installed: 20.1.0
    wanted: 20.1.0
  react:
    installed: 19.2.3
    wanted: 19.2.3
  react-native:
    installed: 0.84.1
    wanted: 0.84.1
  react-native-macos: Not Found
npmGlobalPackages:
  "*react-native*": Not Found
Android:
  hermesEnabled: true
  newArchEnabled: true
iOS:
  hermesEnabled: Not found
  newArchEnabled: false

Stacktrace or Logs

2026-04-04 17:31:59.258 11074-11128 ReactNativeJS           com.choreographerissue               I  Hello from service!
2026-04-04 17:32:00.260 11074-11128 ReactNativeJS           com.choreographerissue               I  Hello from service!
2026-04-04 17:32:01.264 11074-11128 ReactNativeJS           com.choreographerissue               I  Hello from service!
2026-04-04 17:32:02.267 11074-11128 ReactNativeJS           com.choreographerissue               I  Hello from service!
2026-04-04 17:32:02.526 11074-11074 Choreographer           com.choreographerissue               D  CoreRune.SYSPERF_ACTIVE_APP_BBA_ENABLE : stop animation in background states

MANDATORY Reproducer

https://github.com/gmanole01/react-native-choreographer-issue

Screenshots and Videos

No response

HeadlessJsTaskService のエントリーポイントと、Choreographer を使用する Android のタイマー スケジューリングパスから始めます。Logcat を監視しながら必須の再現手順で問題を再現し、その後、既存のフォアグラウンド動作を妨げることなくタイマーがバックグラウンドで実行され続けることを確認します。