Fix a crash when visiting Peertube in menu

import java.io.IOException;

import java.io.InputStream;

import java.io.UnsupportedEncodingException;

import java.net.IDN;

import java.net.URL;

import java.net.URLDecoder;

import java.util.ArrayList;

                .proxy(app.fedilab.android.mastodon.helper.Helper.getProxy(_context.getApplicationContext()))

                .build();

        Retrofit retrofit = new Retrofit.Builder()

                .baseUrl("https://" + IDN.toASCII(instance, IDN.ALLOW_UNASSIGNED))

                .baseUrl("https://" + instance)

                .addConverterFactory(GsonConverterFactory.create())

                .client(okHttpClient)

                .build();