fix(cordova): always generate resources when adding platforms
fix(cordova): always generate resources when adding platforms

Checking whether the dev was authenticated used to be a requirement when
`ionic cordova resources` was using Ionic servers. With the default now
to use a local tool, `cordova-res`, this is no longer desired behavior.

fixes https://github.com/ionic-team/ionic-cli/issues/4026

driftyco/ionic-cli,driftyco/ionic-cli,driftyco/ionic-cli