I want to create a foreground service which will run over a long period and will not become cached process in which it can be killed when memory is needed. According to the docs:

Processes that do need to be run over a long period can be created with setForeground.

So i decided to use this method to create a foreground service. Here’s what i did:

MainActivity.kt

class MainActivity : ComponentActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        val request = OneTimeWorkRequest.Builder(MyWorker::class.java).build()
        WorkManager.getInstance(this).enqueue(request)

        setContent {
            Text("The app is now running")
        }
    }
}

MyWorker.kt

class MyWorker(context: Context, parameters: WorkerParameters):
    CoroutineWorker(context, parameters) {
    override suspend fun doWork(): Result {
        if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            val channel = NotificationChannel(
                "1",
                "MAIN",
                NotificationManager.IMPORTANCE_HIGH
            )
            val notificationManager = applicationContext.getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
            notificationManager.createNotificationChannel(channel)
        }

        val notification = NotificationCompat.Builder(applicationContext,"1")
            .setSmallIcon(R.drawable.ic_launcher_background)
            .setContentTitle("The test app is running")
            .build()

        val x = if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.UPSIDE_DOWN_CAKE) {
            ForegroundInfo(1, notification, ServiceInfo.FOREGROUND_SERVICE_TYPE_SPECIAL_USE)
        } else {
            ForegroundInfo(1, notification)
        }
        setForeground(x)
        return Result.success()
    }
}

AndroidManifest.xml

...
<service
    android:name="androidx.work.impl.foreground.SystemForegroundService"
    android:foregroundServiceType="specialUse"
    />
...

After running this app nothing happens. Why? Do i start the work request correctly? Do i have to always set service name in manifest to androidx.work.impl.foreground.SystemForegroundService ? Do i have to implement my own service class when i run a foreground service this way ?