[BGF] fix a token error when screenshare.

Author: oOJohn6Oo

Android/APIExample/app/src/main/java/io/agora/api/example/examples/advanced/MultiProcess.java

@@ -201,7 +201,7 @@ public void onClick(View v)
         else if (v.getId() == R.id.screenShare){
             String channelId = et_channel.getText().toString();
             if (!isSharing) {
-                mSSClient.start(getContext(), getResources().getString(R.string.agora_app_id), null,
+                mSSClient.start(getContext(), getString(R.string.agora_app_id), getString(R.string.agora_access_token),
                         channelId, SCREEN_SHARE_UID, new VideoEncoderConfiguration(
                                 getScreenDimensions(),
                                 FRAME_RATE_FPS_30,