Use Default dispatcher instead of IO

app/src/main/java/org/tasks/Tasks.kt

@@ -14,7 +14,6 @@ import dagger.hilt.android.HiltAndroidApp
 import dagger.hilt.android.qualifiers.ApplicationContext
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
-import kotlinx.coroutines.SupervisorJob
 import kotlinx.coroutines.launch
 import org.tasks.billing.BillingClient
 import org.tasks.billing.Inventory
@@ -72,7 +71,7 @@ class Tasks : Application(), Configuration.Provider {
         }
     }
 
-    private fun backgroundWork() = CoroutineScope(Dispatchers.IO + SupervisorJob()).launch {
+    private fun backgroundWork() = CoroutineScope(Dispatchers.Default).launch {
         NotificationSchedulerIntentService.enqueueWork(context, false)
         CalendarNotificationIntentService.enqueueWork(context)
         refreshScheduler.get().scheduleAll()

app/src/main/java/org/tasks/dashclock/DashClockExtension.kt

@@ -22,7 +22,7 @@ import javax.inject.Inject
 @AndroidEntryPoint
 class DashClockExtension : DashClockExtension() {
     private val job = SupervisorJob()
-    private val scope = CoroutineScope(Dispatchers.IO + job)
+    private val scope = CoroutineScope(Dispatchers.Default + job)
 
     @Inject lateinit var defaultFilterProvider: DefaultFilterProvider
     @Inject lateinit var taskDao: TaskDao
@@ -43,6 +43,7 @@ class DashClockExtension : DashClockExtension() {
     override fun onDestroy() {
         super.onDestroy()
         localBroadcastManager.unregisterReceiver(refreshReceiver)
+        job.cancel()
     }
 
     override fun onUpdateData(i: Int) {

app/src/main/java/org/tasks/injection/InjectingService.kt

@@ -15,7 +15,7 @@ import javax.inject.Inject
 
 abstract class InjectingService : Service() {
     private val job = SupervisorJob()
-    private val scope = CoroutineScope(Dispatchers.IO + job)
+    private val scope = CoroutineScope(Dispatchers.Default + job)
 
     @Inject lateinit var firebase: Firebase