docs: public static void startBroadcastActivity(Activity host, BroadcastListener listener) {
          checkNotNull(listener, host.getString(R.string.error_no_broadcastlistener));
          if (sSessionConfig == null) {
              setupDefaultSessionConfig();
          }
          checkNotNull(sClientKey);
          checkNotNull(sClientSecret);
          sBroadcastListener = listener;
          Intent broadcastIntent = new Intent(host, BroadcastActivity.class);
          broadcastIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
          host.startActivity(broadcastIntent);
      }