checkArgument crashing, if ui_locales has been set manually with earlier versions of AppAuth.

[hnljp]

Checklist:

• I am using the latest release
• I searched for existing GitHub issues
• I read the documentation
• I verified the client configuration matches the information in the identity provider (or I am using dynamic client registration)
• I am either using a custom URI scheme or https with (App Links)[https://developer.android.com/training/app-links] for client redirect.
• I can reproduce the issue in the demo app (optional)

Configuration

• Version: 0.9.1
• Integration: native Kotlin
• Identity provider: Both KeyCloak and ID4

Issue Description

Having set "ui_locales" in earlier versions manually...
After updating from 0.8.1 to 0.9.1 the app is crashing, due to the previous ui_locales parameter being saved in AuthState.

Crashing with the following message "Parameter ui_locales is directly supported via the authorization request builder, use the builder method instead".

Stacktrace:

Caused by java.lang.IllegalArgumentException: Parameter ui_locales is directly supported via the authorization request builder, use the builder method instead
       at net.openid.appauth.Preconditions.checkArgument(Preconditions.java:132)
       at net.openid.appauth.AdditionalParamsProcessor.checkAdditionalParams(AdditionalParamsProcessor.java:62)
       at net.openid.appauth.AuthorizationRequest$Builder.setAdditionalParameters(AuthorizationRequest.java:957)
       at net.openid.appauth.AuthorizationRequest.jsonDeserialize(AuthorizationRequest.java:1161)
       at net.openid.appauth.AuthorizationResponse.jsonDeserialize(AuthorizationResponse.java:514)
       at net.openid.appauth.AuthState.jsonDeserialize(AuthState.java:701)
       at net.openid.appauth.AuthState.jsonDeserialize(AuthState.java:726)

Will return to 0.8.1 for now.

[agologan]

Fixed this by changing how we deserialize the objects in 31f187b
Change is available to test in v0.10.0. Let me know if you run into any issues.