onNetworkChanged() not implemented in androidx.work.impl.background.systemjob.SystemJobService. Must override in a subclass.

Work [ id=e1c3c953-0b9c-440b-8f99-c5b16239e8ec, tags={ vn.hunghd.flutterdownloader.DownloadWorker, flutter_download_task } ] was cancelled
I/WM-WorkerWrapper(26420): java.util.concurrent.CancellationException: Task was cancelled.
I/WM-WorkerWrapper(26420): at androidx.work.impl.utils.futures.AbstractFuture.cancellationExceptionWithCause(AbstractFuture.java:1183)
I/WM-WorkerWrapper(26420): at androidx.work.impl.utils.futures.AbstractFuture.getDoneValue(AbstractFuture.java:513)
I/WM-WorkerWrapper(26420): at androidx.work.impl.utils.futures.AbstractFuture.get(AbstractFuture.java:474)
I/WM-WorkerWrapper(26420): at androidx.work.impl.WorkerWrapper$2.run(WorkerWrapper.java:316)
I/WM-WorkerWrapper(26420): at androidx.work.impl.utils.SerialExecutorImpl$Task.run(SerialExecutorImpl.java:96)
I/WM-WorkerWrapper(26420): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
I/WM-WorkerWrapper(26420): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:644)
I/WM-WorkerWrapper(26420): at java.lang.Thread.run(Thread.java:1012)

Start by inspecting the Android WorkManager integration around androidx.work.impl.background.systemjob.SystemJobService and reproduce the cancellation shown in the issue log. The issue names no repository file or test, so first identify the plugin entry point responsible for the worker and determine whether the missing onNetworkChanged() implementation is the cause. Done should mean the reported cancellation is resolved and covered by an appropriate test or reproduction.

Written by the indexing model from the issue text.