usb-serial-for-android/usbSerialExamples/src/main/res/menu/menu_devices.xml

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
    <item
        android:id="@+id/refresh"
        android:title="Refresh devices" />
    <item
        android:id="@+id/baud_rate"
        android:title="Baud rate" />
</menu>