code: public List<Runnable> shutdownNow() {
          List<Runnable> tasks;
          final ReentrantLock mainLock = this.mainLock;
          mainLock.lock();
          try {
              /* J2ObjC removed.
              checkShutdownAccess();
              */
              advanceRunState(STOP);
              interruptWorkers();
              tasks = drainQueue();
          } finally {
              mainLock.unlock();
          }
          tryTerminate();
          return tasks;
      }
docs: android-note: Removed @throws SecurityException