Download later: Support reduced mode.

This CL adds download later task type to reduced mode support.

Bug: NONE
Change-Id: I18ecd78971fb57d1e12c6802798f05ad5a2c9af5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2461143Reviewed-by: Shakti Sahu <shaktisahu@chromium.org>
Reviewed-by: David Trainor <dtrainor@chromium.org>
Reviewed-by: Min Qin <qinmin@chromium.org>
Commit-Queue: Xing Liu <xingliu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#819054}

chrome/android/java/src/org/chromium/chrome/browser/download/service/DownloadBackgroundTask.java

@@ -42,7 +42,8 @@ public class DownloadBackgroundTask extends NativeBackgroundTask {
         mCurrentTaskType = taskParameters.getExtras().getInt(DownloadTaskScheduler.EXTRA_TASK_TYPE);
         // The feature value could change during native initialization, store it first.
         mStartsServiceManagerOnly =
-                (mCurrentTaskType == DownloadTaskType.DOWNLOAD_AUTO_RESUMPTION_TASK)
+                (mCurrentTaskType == DownloadTaskType.DOWNLOAD_AUTO_RESUMPTION_TASK
+                        || mCurrentTaskType == DownloadTaskType.DOWNLOAD_LATER_TASK)
                 ? CachedFeatureFlags.isEnabled(ChromeFeatureList.SERVICE_MANAGER_FOR_DOWNLOAD)
                 : PrefetchConfiguration.isServiceManagerForBackgroundPrefetchEnabled();
         // Reschedule if minimum battery level is not satisfied.