sidetone: Restart sidetone when output device is changed

Restart sidetone when output device is changed to enable/disable echo
cancellation.

BUG=b:368225372
TEST=Plug in a headphone, enable sidetone, then plug out the headphone

Change-Id: I568d121151e8f3b7b7f33b99407842b24cfad83d
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/adhd/+/5872289
Auto-Submit: Norman Bintang <normanbt@chromium.org>
Reviewed-by: Li-Yu Yu <aaronyu@google.com>
Tested-by: Norman Bintang <normanbt@chromium.org>
Tested-by: chromeos-cop-builder@chromeos-cop.iam.gserviceaccount.com <chromeos-cop-builder@chromeos-cop.iam.gserviceaccount.com>
Commit-Queue: Norman Bintang <normanbt@chromium.org>

cras/src/server/cras_iodev_list.c

@@ -2228,12 +2228,9 @@ void cras_iodev_list_select_node(enum CRAS_STREAM_DIRECTION direction,
     }
   }
 
-  if (direction == CRAS_STREAM_OUTPUT && new_dev && new_dev->active_node) {
-    bool available = is_sidetone_available(new_dev->active_node->type);
-    if (!available) {
-      cras_system_set_sidetone_enabled(false);
-    }
-    cras_observer_notify_sidetone_supported_changed(available);
+  if (direction == CRAS_STREAM_OUTPUT && cras_system_get_sidetone_enabled()) {
+    cras_system_set_sidetone_enabled(false);
+    cras_system_set_sidetone_enabled(true);
   }
 
   cras_iodev_list_notify_active_node_changed(direction);