Remove embedded OkHttp Dll

[gizmohd]

We should really be utilizing the Nuget Package Reference and NOT embed the okhttp.dll in the Nuget file..

The Square.OkHttp3 reference conflicts with this reference...

[Qwin]

I agree this has been an issue for a lot of people for decades.

[voydz]

There is already a fix for that in master contained in pr #177, but there was no new version released since ages, any updates on this?

[Cheesebaron]

This project is dead, move on, use the built in stuff Xamarin provides.

[kkarakk]

@Cheesebaron what is the built in alternative to use the native http handler? does httpclient now automatically use the native handler?

[Cheesebaron]

AndroidClientHandler