Android: fix ext build in case of empty lines at ext_java.files
Android: fix ext build in case of empty lines at ext_java.files

UIKit0/rhodes,louisatome/rhodes,UIKit0/rhodes,UIKit0/rhodes,louisatome/rhodes,louisatome/rhodes,UIKit0/rhodes,UIKit0/rhodes,rhosilver/rhodes-1,UIKit0/rhodes,rhosilver/rhodes-1,rhosilver/rhodes-1,rhosilver/rhodes-1,louisatome/rhodes,rhosilver/rhodes-1,louisatome/rhodes,louisatome/rhodes,louisatome/rhodes,rhosilver/rhodes-1,louisatome/rhodes,UIKit0/rhodes,louisatome/rhodes,rhosilver/rhodes-1,rhosilver/rhodes-1,UIKit0/rhodes,UIKit0/rhodes,rhosilver/rhodes-1,UIKit0/rhodes,rhosilver/rhodes-1