Fix CTS test failures.

    // Use NaN to disable.

    private float mTemporaryScreenAutoBrightnessAdjustmentSettingOverride = Float.NaN;

    // Time when we last logged a warning about calling userActivity() without permission.

    private long mLastWarningAboutUserActivityPermission = Long.MIN_VALUE;

    private native void nativeInit();

    private static native void nativeShutdown();

    private static native void nativeReboot(String reason) throws IOException;

    @Override // Binder call

    public void userActivity(long eventTime, int event, int flags) {

        final long now = SystemClock.uptimeMillis();

        if (mContext.checkCallingOrSelfPermission(android.Manifest.permission.DEVICE_POWER)

                != PackageManager.PERMISSION_GRANTED) {

            // Once upon a time applications could call userActivity().

            // Now we require the DEVICE_POWER permission.  Log a warning and ignore the

            // request instead of throwing a SecurityException so we don't break old apps.

            synchronized (mLock) {

                if (now >= mLastWarningAboutUserActivityPermission + (5 * 60 * 1000)) {

                    mLastWarningAboutUserActivityPermission = now;

                    Slog.w(TAG, "Ignoring call to PowerManager.userActivity() because the "

                            + "caller does not have DEVICE_POWER permission.  "

                            + "Please fix your app!  "

                            + " pid=" + Binder.getCallingPid()

                            + " uid=" + Binder.getCallingUid());

                }

            }

            return;

        }

        if (eventTime > SystemClock.uptimeMillis()) {

            throw new IllegalArgumentException("event time must not be in the future");

        }

        mContext.enforceCallingOrSelfPermission(android.Manifest.permission.DEVICE_POWER, null);

        final int uid = Binder.getCallingUid();

        final long ident = Binder.clearCallingIdentity();

        try {