Merge "Check if the executor is shutdown before submitting more tasks." into main

        synchronized (mLock) {

            if (mCurrentSyncTask != null && !mCurrentSyncTask.isDone()) {

                var unused = mCurrentSyncTask.cancel(false);

                mCurrentSyncTask = null;

            }

            if (!mExecutor.isShutdown()) {

                mCurrentSyncTask = mExecutor.submit(runnable);

            }

        }

        return settableSyncStatus;

    }