[browser][http] Fix HttpClientHandler "Supports*" properties regressions (#39889)

[browser][http] Fix HttpClientHandler "Supports*" properties regressions (#39889)

* [browser][http] Fix HttpClientHandler "Supports*" properties regressions

* Also needs implementing on SocketsHttpHandler.

On the SocketsHttpHandler we will default to `true` here.

```
        internal bool SupportsAutomaticDecompression => true;
        internal bool SupportsProxy => true;
        internal bool SupportsRedirectConfiguration => true;
```

* Should be internal accessor