Merge "No need to 'addChild' when start 'FLAG_ACTIVITY_CLEAR_TOP' Activity."

            final ActivityRecord top = targetTask.performClearTaskForReuseLocked(mStartActivity,

                    mLaunchFlags);

            // The above code can remove {@code reusedActivity} from the task, leading to the

            // {@code ActivityRecord} removing its reference to the {@code Task}. The task

            // reference is needed in the call below to {@link setTargetStackAndMoveToFrontIfNeeded}

            if (targetTaskTop.getTask() == null) {

                targetTask.addChild(targetTaskTop);

            }

            if (top != null) {

                if (top.isRootOfTask()) {

                    // Activity aliases may mean we use different intents for the top activity,