Add long running task support

Signed-off-by: alperozturk <alper_ozturk@proton.me>

app/src/main/AndroidManifest.xml

@@ -239,6 +239,12 @@
             android:exported="false"
             android:configChanges="orientation|screenLayout|screenSize|keyboardHidden"
             android:theme="@style/Theme.ownCloud.Media" />
+        <service
+            android:name="androidx.work.impl.foreground.SystemForegroundService"
+            android:directBootAware="false"
+            android:enabled="@bool/enable_system_foreground_service_default"
+            android:exported="false"
+            android:foregroundServiceType="dataSync" />
         <service
             android:name=".authentication.AccountAuthenticatorService"
             android:exported="false">

app/src/main/java/com/nextcloud/client/files/downloader/DownloadNotificationManager.kt

@@ -111,7 +111,7 @@ class DownloadNotificationManager(
     @Suppress("MagicNumber")
     fun showCompleteNotification(text: String) {
         Handler(Looper.getMainLooper()).postDelayed({
-            updateNotificationText(null,text, true)
+            updateNotificationText(null, text, true)
             dismissNotification()
         }, 3000)
     }
@@ -156,4 +156,12 @@ class DownloadNotificationManager(
             )
         )
     }
+
+    fun getId(): Int {
+        return id
+    }
+
+    fun getNotification(): Notification {
+        return notificationBuilder.build()
+    }
 }

app/src/main/java/com/nextcloud/client/files/downloader/FileDownloadWorker.kt

@@ -36,8 +36,10 @@ import com.nextcloud.client.account.UserAccountManager
 import com.nextcloud.java.util.Optional
 import com.nextcloud.model.WorkerState
 import com.nextcloud.model.WorkerStateLiveData
+import com.nextcloud.utils.ForegroundServiceHelper
 import com.owncloud.android.R
 import com.owncloud.android.datamodel.FileDataStorageManager
+import com.owncloud.android.datamodel.ForegroundServiceType
 import com.owncloud.android.datamodel.OCFile
 import com.owncloud.android.files.services.IndexedForest
 import com.owncloud.android.lib.common.OwnCloudAccount
@@ -123,6 +125,14 @@ class FileDownloadWorker(
 
             addAccountUpdateListener()
 
+            setForegroundAsync(
+                ForegroundServiceHelper.createWorkerForegroundInfo(
+                    notificationManager.getId(),
+                    notificationManager.getNotification(),
+                    ForegroundServiceType.DataSync
+                )
+            )
+
             requestDownloads.forEach {
                 downloadFile(it)
             }