[Android]1.NMS-5998：fix screen capture size problem;2.fix audio route switch bug

Author: xgfd3

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

@@ -224,7 +224,7 @@ public void onClick(View v) {
             speaker.setActivated(!speaker.isActivated());
             speaker.setText(getString(speaker.isActivated() ? R.string.speaker : R.string.earpiece));
             /**Turn off / on the speaker and change the audio playback route.*/
-            engine.setDefaultAudioRoutetoSpeakerphone(speaker.isActivated());
+            engine.setEnableSpeakerphone(speaker.isActivated());
         }
     }
 

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

@@ -157,6 +157,8 @@ public void onActivityResult(int requestCode, int resultCode, @Nullable Intent d
             DisplayMetrics metrics = new DisplayMetrics();
             getActivity().getWindowManager().getDefaultDisplay().getMetrics(metrics);
             ScreenCaptureParameters parameters = new ScreenCaptureParameters();
+            parameters.videoCaptureParameters.width = 720;
+            parameters.videoCaptureParameters.height = (int) (720 * 1.0f / metrics.widthPixels * metrics.heightPixels);
             parameters.videoCaptureParameters.framerate = DEFAULT_SHARE_FRAME_RATE;
             parameters.captureAudio = true;
             // start screen capture and update options