Keep mbox export awake

app/src/main/java/eu/faircode/email/FragmentFolders.java

@@ -1389,7 +1389,7 @@ public class FragmentFolders extends FragmentBase {
             protected void onException(Bundle args, Throwable ex) {
                 Log.unexpectedError(getParentFragmentManager(), ex);
             }
-        }.execute(this, args, "folder:export");
+        }.setKeepAwake(true).execute(this, args, "folder:export");
     }
 
     private void onEditAccountName(Bundle args) {

app/src/main/java/eu/faircode/email/SimpleTask.java

@@ -52,6 +52,7 @@ import java.util.concurrent.Future;
 public abstract class SimpleTask<T> implements LifecycleObserver {
     private boolean log = true;
     private boolean count = true;
+    private boolean keepawake = false;
 
     private String name;
     private long started;
@@ -85,6 +86,11 @@ public abstract class SimpleTask<T> implements LifecycleObserver {
         return this;
     }
 
+    public SimpleTask<T> setKeepAwake(boolean value) {
+        this.keepawake = value;
+        return this;
+    }
+
     public SimpleTask<T> setExecutor(ExecutorService executor) {
         this.localExecutor = executor;
         return this;
@@ -183,7 +189,10 @@ public abstract class SimpleTask<T> implements LifecycleObserver {
             public void run() {
                 // Run in background thread
                 try {
-                    wl.acquire(MAX_WAKELOCK);
+                    if (keepawake)
+                        wl.acquire();
+                    else
+                        wl.acquire(MAX_WAKELOCK);
 
                     if (log)
                         Log.i("Executing task=" + name);