How to transfer an activity context in an application to a service in another application

So, I have activity in the application that starts the service:

private void startService() {
    if (started) {
        Toast.makeText(Main.this, "Service already started",
                Toast.LENGTH_SHORT).show();
    } else {
        Intent i = new Intent();
        i.setClassName("com.enorbitas.daemon.service",
                "com.enorbitas.daemon.service.DaemonService");
        startService(i);
        started = true;
        updateServiceStatus();
        Log.d(getClass().getSimpleName(), "startService()");
    }

}

The action starts as follows:

<intent-filter>
            <action android:name="android.hardware.usb.action.USB_DEVICE_ATTACHED" />
        </intent-filter>

The service then registers and connects to this user USB device. To do this, he needs an activity context:

        mUsbManager = (UsbManager) parent.getSystemService(Context.USB_SERVICE);
        HashMap<String, UsbDevice> deviceList = mUsbManager.getDeviceList();
        Iterator<UsbDevice> deviceIterator = deviceList.values().iterator();
        while(deviceIterator.hasNext()){
            UsbDevice device = deviceIterator.next();
        }

        Intent intent = parent.getIntent();
        String action = intent.getAction();
        UsbDevice device = (UsbDevice) intent
                .getParcelableExtra(UsbManager.EXTRA_DEVICE);
        if (UsbManager.ACTION_USB_DEVICE_ATTACHED.equals(action)) {
            setDevice(device);
            Log.i(TAG, "usb conectado");
        } else if (UsbManager.ACTION_USB_DEVICE_DETACHED.equals(action)) {
            if (mDevice != null && mDevice.equals(device)) {
                setDevice(null);
                Log.i(TAG, "usb NO conectado");
            }
        }

parent will be the activity that starts the service. This approach was used because this code was used in one application, but now I want it to be a service so that other applications can connect to it.

Is there a way to pass an activity context to a service? I read a lot about intentions and bundles, disassembled and serialized, but none of this works for me. I need to convey context.

Any ideas?