Merge "Remove pinned stack when switching users."

        final int focusStackId = mFocusedStack.getStackId();

        // We dismiss the docked stack whenever we switch users.

        moveTasksToFullscreenStackLocked(DOCKED_STACK_ID, focusStackId == DOCKED_STACK_ID);

        // Also dismiss the pinned stack whenever we switch users. Removing the pinned stack will

        // also cause all tasks to be moved to the fullscreen stack at a position that is

        // appropriate.

        removeStackLocked(PINNED_STACK_ID);

        mUserStackInFront.put(mCurrentUser, focusStackId);

        final int restoreStackId = mUserStackInFront.get(userId, HOME_STACK_ID);