Default Help me do a small modification of android

I have found the file to modify
/overlay/frameworks/base/core/res/res/values/config.xml

Code:
-    <!-- Shutdown if the battery temperature exceeds (this value * 0.1) Celsius. -->
-    <integer name="config_shutdownBatteryTemperature">600</integer>
BatteryService.java reads this value and compares with the temperature reading and issues a shutdown command.

Code:
 private void shutdownIfOverTempLocked() {
        // shut down gracefully if temperature is too high (> 68.0C by default)
        // wait until the system has booted before attempting to display the
        // shutdown dialog.
        if (mBatteryProps.batteryTemperature > mShutdownBatteryTemperature) {
            mHandler.post(new Runnable() {
                @Override
                public void run() {
                    if (ActivityManagerNative.isSystemReady()) {
                        Intent intent = new Intent(Intent.ACTION_REQUEST_SHUTDOWN);
                        intent.putExtra(Intent.EXTRA_KEY_CONFIRM, false);
                        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                        mContext.startActivityAsUser(intent, UserHandle.CURRENT);
                    }
                }
            });
How do I modify this value?