Merge "init: add timers around sync() during shutdown"

        if (kill_after_apps.count(s->name())) s->Stop();

    }

    // 4. sync, try umount, and optionally run fsck for user shutdown

    {

        Timer sync_timer;

        LOG(INFO) << "sync() before umount...";

        sync();

        LOG(INFO) << "sync() before umount took" << sync_timer;

    }

    UmountStat stat = TryUmountAndFsck(runFsck, shutdown_timeout - t.duration());

    // Follow what linux shutdown is doing: one more sync with little bit delay

    {

        Timer sync_timer;

        LOG(INFO) << "sync() after umount...";

        sync();

        LOG(INFO) << "sync() after umount took" << sync_timer;

    }

    if (cmd != ANDROID_RB_THERMOFF) std::this_thread::sleep_for(100ms);

    LogShutdownTime(stat, &t);