AuthorizationService is not disposed

[itaybia]

the AuthorizationService created inside AppAuthWebView should be disposed when not used anymore otherwise it creates a leak.
also, the service creates a binding to a CustomTabManager which may be problematic (and is also something you wished not to use in the first place, but use the web view instead). i think the AppAuthConfiguration should be set with a browser matcher that will always return false.

[hadiidbouk]

I am really busy at the moment, i can't edit this library soon, i will be grateful if you fix these problems and send me PR.

[ghost]

For the second part I think this could work:

AppAuthConfiguration appAuthConfig = new AppAuthConfiguration.Builder()
.setBrowserMatcher(descriptor -> false)
.build();