Anbox isn't getting installed at all in 17.04 it worked in 16.10, I tried this command
sudo snap install --classic anbox-installer && anbox-installer
I found these lines to be errors in installation process
E: The repository 'http://ppa.launchpad.net/alex-wv/pulseaudio-equalizer-ppa/ubuntu zesty Release' does not have a Release file. N: Updating from such a repository can't be done securely, and is therefore disabled by default. N: See apt-secure(8) manpage for repository creation and user configuration details.
Full installation log is posted here at Paste Ubuntu
I think this is happening because it doesn't support 17.04 yet and support will be added at some point later, my another question is is their some sort of Backward compatibility like feature in Ubuntu (it' present in windows)