Fix WorkManager cancellation issues

(cherry picked from commit 7e6811692e8c16a074271ffb1ca01a73daeb4404)

app/src/main/java/eu/kanade/tachiyomi/data/sync/SyncDataJob.kt

@@ -45,7 +45,7 @@ class SyncDataJob(private val context: Context, workerParams: WorkerParameters)
         } catch (e: Exception) {
             logcat(LogPriority.ERROR, e)
             notifier.showSyncError(e.message)
-            Result.failure()
+            Result.success() // try again next time
         } finally {
             context.cancelNotification(Notifications.ID_RESTORE_PROGRESS)
         }

app/src/main/java/exh/eh/EHentaiUpdateWorker.kt

@@ -61,14 +61,14 @@ class EHentaiUpdateWorker(private val context: Context, workerParams: WorkerPara
     override suspend fun doWork(): Result {
         return try {
             if (requiresWifiConnection(preferences) && !context.isConnectedToWifi()) {
-                Result.failure()
+                Result.success() // retry again later
             } else {
                 startUpdating()
                 logger.d("Update job completed!")
                 Result.success()
             }
         } catch (e: Exception) {
-            Result.failure()
+            Result.success() // retry again later
         }
     }