It doesn't.
Dolphin for Android isn't feature parity with the PC version, nor are there many devices that can run it reasonably well without being screwed by drivers, so there is little incentive to expose builds to the user facing site. People will just download it, complain it doesn't install on their phone from 2010, and it would just be a pain.
Dolphin for Android isn't feature parity with the PC version, nor are there many devices that can run it reasonably well without being screwed by drivers, so there is little incentive to expose builds to the user facing site. People will just download it, complain it doesn't install on their phone from 2010, and it would just be a pain.