Fix unit issue in Slog.wtf output

    private SparseLongArray mLastUserTimeUs = new SparseLongArray();

    private SparseLongArray mLastSystemTimeUs = new SparseLongArray();

    private long mLastTimeRead = 0;

    private long mLastTimeReadUs = 0;

    /**

     * Reads the proc file, calling into the callback with a delta of time for each UID.

     *                 a fresh delta.

     */

    public void readDelta(@Nullable Callback callback) {

        long now = SystemClock.elapsedRealtime();

        long nowUs = SystemClock.elapsedRealtime() * 1000;

        try (BufferedReader reader = new BufferedReader(new FileReader(sProcFile))) {

            TextUtils.SimpleStringSplitter splitter = new TextUtils.SimpleStringSplitter(' ');

            String line;

                        userTimeDeltaUs -= mLastUserTimeUs.valueAt(index);

                        systemTimeDeltaUs -= mLastSystemTimeUs.valueAt(index);

                        final long timeDiffMs = (now - mLastTimeRead) * 1000;

                        final long timeDiffUs = nowUs - mLastTimeReadUs;

                        if (userTimeDeltaUs < 0 || systemTimeDeltaUs < 0 ||

                                userTimeDeltaUs > timeDiffMs || systemTimeDeltaUs > timeDiffMs ) {

                                userTimeDeltaUs > timeDiffUs || systemTimeDeltaUs > timeDiffUs) {

                            StringBuilder sb = new StringBuilder("Malformed cpu data!\n");

                            sb.append("Time between reads: ");

                            TimeUtils.formatDuration(timeDiffMs, sb);

                            TimeUtils.formatDuration(timeDiffUs / 1000, sb);

                            sb.append("ms\n");

                            sb.append("Previous times: u=");

                            TimeUtils.formatDuration(mLastUserTimeUs.valueAt(index) / 1000, sb);

        } catch (IOException e) {

            Slog.e(TAG, "Failed to read uid_cputime", e);

        }

        mLastTimeRead = now;

        mLastTimeReadUs = nowUs;

    }

    /**