Fetch the same userInfo as in ADAL4j

[balishreya]

As @xiaozhon mentioned in https://github.com/AzureAD/microsoft-authentication-library-for-java/issues/642, we need a one to one mapping from the displayId to some field in MSAL. We understand this is not the best practice since the username in Azure could change but need this for backwards compatibility reasons.

Could you confirm that in MSAL, we would need to perform this logic to get this one-to-one mapping? (similar to https://github.com/AzureAD/azure-activedirectory-library-for-java/blob/b35a4b30c4501df50466cf85b87acbd53a6228d3/src/main/java/com/microsoft/aad/adal4j/UserInfo.java#L134)

       // idToken.preferred_email should be the same as upn
        if (!StringHelper.isBlank(idtoken.preferred_username) {
            displayableId =  idtoken.preferred_username
        }
        else if (!StringHelper.isBlank(idtoken.email)) {
            displayableId = idtoken.email
      }

Originally posted by @balishreya in https://github.com/AzureAD/microsoft-authentication-library-for-java/issues/642#issuecomment-1830216378

[Avery-Dunn]

Closing this thread since the conversation continued in the original: https://github.com/AzureAD/microsoft-authentication-library-for-java/issues/642#issuecomment-1830216378

Feel free to reopen if there are any related questions or if that other conversation leads to some action items we should track.