redirect uri should be RuName, not a url.

[soenkegissel]

In AuthorizationLink.kt some unfulfillable checks leave the user no choice but to enter invalid information.
For redirect uri the RuName should be enterned (eg. Davy_Developer-DavyDeve-DavysT-euiukxwt) not https://my-accept-url.
You can get more information here (https://developer.ebay.com/api-docs/static/oauth-consent-request.html):

You checks for uri begin with https:// is unfulfillable. As well as the check if redirect uri equals the informations entered in AndroidManifest.xml.

Later on when I exchange the authorization code for a User access token I enter redirect uri as RuName as well (https://developer.ebay.com/api-docs/static/oauth-auth-code-grant-request.html):

[soenkegissel]

Added the fully qualified package name to AndroidManifest to be usable when importing as a library. Before it was ClassNotFound exception as it was looked for in com.myapp.oauth2.ui.OAuthRedirectActivity.