Move all DownloadService.stop calls to Downloader (#9146)

Downloader.stop is now the sole responsible for stopping the
DownloadService. This will help cleanly removing
DownloadService.stop when migrating to coroutines.

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

@@ -67,7 +67,7 @@ class DownloadManager(
      */
     fun pauseDownloads() {
         downloader.pause()
-        DownloadService.stop(context)
+        downloader.stop()
     }
 
     /**
@@ -75,7 +75,7 @@ class DownloadManager(
      */
     fun clearQueue() {
         downloader.clearQueue()
-        DownloadService.stop(context)
+        downloader.stop()
     }
 
     /**
@@ -115,8 +115,8 @@ class DownloadManager(
         val wasRunning = downloader.isRunning
 
         if (downloads.isEmpty()) {
-            DownloadService.stop(context)
+            downloader.clearQueue()
-            queue.clear()
+            downloader.stop()
             return
         }
 
@@ -275,7 +275,6 @@ class DownloadManager(
 
         if (wasRunning) {
             if (queue.isEmpty()) {
-                DownloadService.stop(context)
                 downloader.stop()
             } else if (queue.isNotEmpty()) {
                 downloader.start()

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

@@ -167,6 +167,11 @@ class Downloader(
         }
 
         isPaused = false
+
+        // Prevent recursion when DownloadService.onDestroy() calls downloader.stop()
+        if (DownloadService.isRunning.value) {
+            DownloadService.stop(context)
+        }
     }
 
     /**
@@ -217,9 +222,9 @@ class Downloader(
                     completeDownload(it)
                 },
                 { error ->
-                    DownloadService.stop(context)
                     logcat(LogPriority.ERROR, error)
                     notifier.onError(error.message)
+                    stop()
                 },
             )
     }
@@ -634,7 +639,7 @@ class Downloader(
             queue.remove(download)
         }
         if (areAllDownloadsFinished()) {
-            DownloadService.stop(context)
+            stop()
         }
     }