Updated Projects Using usb serial for android (markdown)

Projects-Using-usb-serial-for-android.md

@@ -26,3 +26,4 @@
 * [jdAlcorn/usb-serial-for-android](https://github.com/jdAlcorn/usb-serial-for-android) -- fork with RawUsb support
 * [juce_serialport](https://github.com/cpr2323/juce_serialport) -- A [JUCE](https://github.com/juce-framework/JUCE) module allowing serial communication on Windows, Mac, and Android
 * [phonk](http://phonk.app) formerly Protocoder -- Prototyping environment of creative applications for Android
+* [flutter_serial_communication](https://github.com/farellsujanto/flutter_serial_communication) -- Flutter library for serial communication