Merge "Mark the task as reusable while clearing activities in the Task" into tm-qpr-dev

        final Task task = taskTop.getTask();

        // If ActivityOptions are moved out and need to be aborted or moved to taskTop.

        final ActivityOptions topOptions = sResetTargetTaskHelper.process(task, forceReset);

        final ActivityOptions topOptions;

        // Set the task to be reused, so the TaskFragment#mClearedTaskForReuse can be set if the

        // embedded activities are finished while reset task.

        mReuseTask = true;

        try {

            topOptions = sResetTargetTaskHelper.process(task, forceReset);

        } finally {

            mReuseTask = false;

        }

        if (mChildren.contains(task)) {

            final ActivityRecord newTop = task.getTopNonFinishingActivity();