Xamarin.Android で Fused Location Provider(など)を使う ref: http://qiita.com/items/550859347e84a0410d75

Metadata.xml

<metadata>
    <remove-node path="/api/package[@name='com.google.android.gms.maps']/class[@name='GoogleMapOptionsCreator']" />
    <remove-node path="/api/package[@name!='com.google.android.gms.maps' 
        and @name != 'com.google.android.gms.maps.model' 
        and @name != 'com.google.android.gms.common'
        and @name != 'com.google.android.gms.location']" />
    <remove-node path="/api/package[@name='com.google.android.gms.maps.model']/class[contains (@name, 'Creator')]" />
    <remove-node path="/api/package[@name='com.google.android.gms.location']/class[contains (@name, 'Creator')]" />

    <attr path="/api/package[@name='com.google.android.gms.maps']" name="managedName">Android.Gms.Maps</attr>
    <attr path="/api/package[@name='com.google.android.gms.maps.model']" name="managedName">Android.Gms.Maps.Model</attr>
    <attr path="/api/package[@name='com.google.android.gms.common']" name="managedName">Android.Gms.Common</attr>  
    <attr path="/api/package[@name='com.google.android.gms.location']" name="managedName">Android.Gms.Location</attr>  

    <attr path="/api/package[@name='com.google.android.gms.maps.model']/class[@name='MarkerOptions']/method[@name='position']" name="managedName">SetPosition</attr>
    <attr path="/api/package[@name='com.google.android.gms.maps.model']/class[@name='MarkerOptions']/method[@name='snippet']" name="managedName">SetSnippet</attr>
    <attr path="/api/package[@name='com.google.android.gms.maps.model']/class[@name='MarkerOptions']/method[@name='title']" name="managedName">SetTitle</attr>
</metadata>