The links you've given are for native iOS (XCode) and Android (Eclipse) projects and not for hybrid apps utilizing Cordova (previously PhoneGap). I could not find a Cordova plugin available in their repository, so I have to assume they do not have one yet. Thus the given code has to be altered, so it could be used as a Cordova plugin and the plugin.xml is not the only effort you have to tackle with. You can find more information how to make this happen from Cordova docs:
And here is info what the plugin.xml should contain in order for the plugin to be usable in Icenium:
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