I found out that it is not possible to transfer my XAML vectors into Android environment. I took another way:
As far as I see, the best way to use verctor icons in Android is using font icon libraries. https://github.com/bperin/FontAwesomeAndroid is what I used.
Later I needed more icons than provided by the FontAwesome library. My search ended with http://fontastic.me/ service. You can generate your custom font collection free of charge. Then I modified source code of FontAwesomeAndroid so I am able to use my own font icon collection.