This change on its own doesn't make Google Android builds less open. It does the opposite. Now people can download apps directly from the websites of the publis

This change on its own doesn't make Google Android builds less open. It does the opposite. Now people can download apps directly from the websites of the publishers without getting a scary warning on Google Android builds. That's all this does. Separately, they're going to increase friction the first time you allow installing apps outside of the Play Store or via this mechanism and also decrease friction on subsequent times, also on Google Android builds.