Keep the paused download notification after the worker stops

The paused notification reused the download worker's foreground notification
id, so it was removed together with the foreground service when the worker
finished.

Closes #2791

app/src/main/java/eu/kanade/tachiyomi/data/download/DownloadNotifier.kt

@@ -58,6 +58,7 @@ class DownloadNotifier(
      */
     fun dismissProgress() {
         context.cancelNotification(Notifications.ID_DOWNLOAD_CHAPTER_PROGRESS)
+        context.cancelNotification(Notifications.ID_DOWNLOAD_CHAPTER_PAUSED)
     }
 
     /**
@@ -68,6 +69,7 @@ class DownloadNotifier(
     fun onProgressChange(download: Download) {
         with(progressNotificationBuilder) {
             if (!isDownloading) {
+                context.cancelNotification(Notifications.ID_DOWNLOAD_CHAPTER_PAUSED)
                 setSmallIcon(android.R.drawable.stat_sys_download)
                 clearActions()
                 // Open download manager when clicked
@@ -117,13 +119,17 @@ class DownloadNotifier(
      * Show notification when download is paused.
      */
     fun onPaused() {
-        with(progressNotificationBuilder) {
+        // The progress id belongs to the download worker's foreground service, which takes the
+        // notification with it when the worker stops
+        context.notify(
+            Notifications.ID_DOWNLOAD_CHAPTER_PAUSED,
+            Notifications.CHANNEL_DOWNLOADER_PROGRESS,
+        ) {
             setContentTitle(context.stringResource(MR.strings.chapter_paused))
             setContentText(context.stringResource(MR.strings.download_notifier_download_paused))
             setSmallIcon(R.drawable.ic_pause_24dp)
-            setProgress(0, 0, false)
-            setOngoing(false)
-            clearActions()
+            setLargeIcon(BitmapFactory.decodeResource(context.resources, R.mipmap.ic_launcher))
+            setOnlyAlertOnce(true)
             // Open download manager when clicked
             setContentIntent(NotificationHandler.openDownloadManagerPendingActivity(context))
             // Resume action
@@ -138,8 +144,6 @@ class DownloadNotifier(
                 context.stringResource(MR.strings.action_cancel_all),
                 NotificationReceiver.clearDownloadsPendingBroadcast(context),
             )
-
-            show(Notifications.ID_DOWNLOAD_CHAPTER_PROGRESS)
         }
 
         // Reset initial values

app/src/main/java/eu/kanade/tachiyomi/data/notification/Notifications.kt

@@ -37,6 +37,7 @@ object Notifications {
     private const val GROUP_DOWNLOADER = "group_downloader"
     const val CHANNEL_DOWNLOADER_PROGRESS = "downloader_progress_channel"
     const val ID_DOWNLOAD_CHAPTER_PROGRESS = -201
+    const val ID_DOWNLOAD_CHAPTER_PAUSED = -203
     const val CHANNEL_DOWNLOADER_ERROR = "downloader_error_channel"
     const val ID_DOWNLOAD_CHAPTER_ERROR = -202