Fix crash on manga downloading

app/build.gradle

@@ -16,7 +16,7 @@ android {
 		minSdkVersion 21
 		targetSdkVersion 29
 		versionCode gitCommits
-		versionName '0.5-rc1'
+		versionName '0.5-rc2'
 
 		kapt {
 			arguments {

app/src/main/java/org/koitharu/kotatsu/ui/download/DownloadService.kt

@@ -77,9 +77,9 @@ class DownloadService : BaseService() {
 		return launch(Dispatchers.IO) {
 			mutex.lock()
 			wakeLock.acquire(TimeUnit.HOURS.toMillis(1))
-			withContext(Dispatchers.Main) {
 			notification.fillFrom(manga)
 			notification.setCancelId(startId)
+			withContext(Dispatchers.Main) {
 				startForeground(DownloadNotification.NOTIFICATION_ID, notification())
 			}
 			val destination = settings.getStorageDir(this@DownloadService)
@@ -94,10 +94,8 @@ class DownloadService : BaseService() {
 							.build()
 					).drawable
 				}
-				withContext(Dispatchers.Main) {
 				notification.setLargeIcon(cover)
 				notification.update()
-				}
 				val data = if (manga.chapters == null) repo.getDetails(manga) else manga
 				output = MangaZip.findInDir(destination, data)
 				output.prepare(data)
@@ -141,31 +139,25 @@ class DownloadService : BaseService() {
 						}
 					}
 				}
-				withContext(Dispatchers.Main) {
 				notification.setCancelId(0)
 				notification.setPostProcessing()
 				notification.update()
-				}
 				output.compress()
 				val result = MangaProviderFactory.createLocal().getFromFile(output.file)
-				withContext(Dispatchers.Main) {
 				notification.setDone(result)
 				notification.dismiss()
 				notification.update(manga.id.toInt().absoluteValue)
-				}
 			} catch (_: CancellationException) {
-				withContext(Dispatchers.Main + NonCancellable) {
+				withContext(NonCancellable) {
 					notification.setCancelling()
 					notification.setCancelId(0)
 					notification.update()
 				}
 			} catch (e: Throwable) {
-				withContext(Dispatchers.Main) {
 				notification.setError(e)
 				notification.setCancelId(0)
 				notification.dismiss()
 				notification.update(manga.id.toInt().absoluteValue)
-				}
 			} finally {
 				withContext(NonCancellable) {
 					jobs.remove(startId)