Small DownloadManager fixes

Fix suppressing initial "state changed to paused" listener invocations
for new added tasks that are immediately started.

Notify listeners for loaded actions queued state if they are not started
immediately.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=196542693

library/core/src/main/java/com/google/android/exoplayer2/offline/DownloadManager.java

@@ -33,6 +33,7 @@ import com.google.android.exoplayer2.offline.DownloadAction.Deserializer;
 import com.google.android.exoplayer2.upstream.DataSource;
 import com.google.android.exoplayer2.upstream.cache.Cache;
 import com.google.android.exoplayer2.util.Assertions;
+import com.google.android.exoplayer2.util.Util;
 import java.io.ByteArrayInputStream;
 import java.io.File;
 import java.io.IOException;
@@ -250,7 +251,6 @@ public final class DownloadManager {
     Assertions.checkState(!released);
     Task task = addTaskForAction(action);
     if (initialized) {
-      notifyListenersTaskStateChange(task);
       saveActions();
       maybeStartTasks();
       if (task.currentState == STATE_QUEUED) {
@@ -413,7 +413,6 @@ public final class DownloadManager {
     if (released) {
       return;
     }
-    logd("Task state is changed", task);
     boolean stopped = !task.isActive();
     if (stopped) {
       activeDownloadTasks.remove(task);
@@ -430,6 +429,7 @@ public final class DownloadManager {
   }
 
   private void notifyListenersTaskStateChange(Task task) {
+    logd("Task state is changed", task);
     TaskState taskState = task.getDownloadState();
     for (Listener listener : listeners) {
       listener.onTaskStateChanged(this, taskState);
@@ -468,18 +468,16 @@ public final class DownloadManager {
                       listener.onInitialized(DownloadManager.this);
                     }
                     if (!pendingTasks.isEmpty()) {
-                      for (int i = 0; i < pendingTasks.size(); i++) {
-                        tasks.add(pendingTasks.get(i));
-                      }
+                      tasks.addAll(pendingTasks);
                       saveActions();
                     }
                     maybeStartTasks();
-                    for (int i = 0; i < pendingTasks.size(); i++) {
-                      Task pendingTask = pendingTasks.get(i);
-                      if (pendingTask.currentState == STATE_QUEUED) {
+                    for (int i = 0; i < tasks.size(); i++) {
+                      Task task = tasks.get(i);
+                      if (task.currentState == STATE_QUEUED) {
                         // Task did not change out of its initial state, and so its initial state
                         // won't have been reported to listeners. Do so now.
-                        notifyListenersTaskStateChange(pendingTask);
+                        notifyListenersTaskStateChange(task);
                       }
                     }
                   }
@@ -699,9 +697,19 @@ public final class DownloadManager {
           + ' '
           + (action.isRemoveAction ? "remove" : "download")
           + ' '
+          + toString(action.data)
+          + ' '
           + getStateString();
     }
 
+    private static String toString(byte[] data) {
+      if (data.length > 100) {
+        return "<data is too long>";
+      } else {
+        return '\'' + Util.fromUtf8Bytes(data) + '\'';
+      }
+    }
+
     private String getStateString() {
       switch (currentState) {
         case STATE_QUEUED_CANCELING: