Merge "Deprecate ActivityRecord#mLastKnownParent" into sc-dev

    AnimatingActivityRegistry mAnimatingActivityRegistry;

    // Set whenever the ActivityRecord gets reparented to a Task so we can know the last known

    // parent was when the ActivityRecord is detached from the hierarchy

    private Task mLastKnownParent;

    // Set to the previous Task parent of the ActivityRecord when it is reparented to a new Task

    // due to picture-in-picture. This gets cleared whenever this activity or the Task

    // it references to gets removed. This should also be cleared when we move out of pip.

            if (getDisplayContent() != null) {

                getDisplayContent().mClosingApps.remove(this);

            }

        } else if (mLastKnownParent != null && mLastKnownParent.getRootTask() != null) {

        } else if (oldTask != null && oldTask.getRootTask() != null) {

            task.getRootTask().mExitingActivities.remove(this);

        }

        final Task rootTask = getRootTask();

                ? rootTask.getAnimatingActivityRegistry()

                : null;

        mLastKnownParent = task;

        if (mLastKnownParent == mLastParentBeforePip) {

        if (task == mLastParentBeforePip) {

            // Activity's reparented back from pip, clear the links once established

            clearLastParentBeforePip();

        }