fix: Undo button not updating bookmark icon (fossasia#2365)

* fix fossasia#2363: Fix undo button not updating bookmark icon

* fix fossasia#2363: Add TODO

* fix fossasia#2363: Move TODO

* fix fossasia#2363: Move TODO inside onResume

* fix fossasia#2363: Add another TODO

Author: pulakdp

android/app/src/main/java/org/fossasia/openevent/core/speaker/SpeakerDetailsActivity.java

@@ -34,6 +34,7 @@
 
 import org.fossasia.openevent.R;
 import org.fossasia.openevent.common.api.Urls;
+import org.fossasia.openevent.common.events.BookmarkChangedEvent;
 import org.fossasia.openevent.common.events.ConnectionCheckEvent;
 import org.fossasia.openevent.common.ui.SnackbarUtil;
 import org.fossasia.openevent.common.ui.Views;
@@ -54,6 +55,7 @@
 
 import butterknife.BindView;
 import butterknife.OnClick;
+import timber.log.Timber;
 
 public class SpeakerDetailsActivity extends BaseActivity implements AppBarLayout.OnOffsetChangedListener, OnBookmarkSelectedListener, SessionsListAdapter.OnItemClickListener {
 
@@ -286,6 +288,22 @@ private void hideEmptyURLButtons() {
         }
 
     }
+
+    private void loadData() {
+        speakerDetailsViewModel.getSpeaker(speakerName).observe(this, speakerData -> {
+            selectedSpeaker = speakerData;
+            loadSpeakerDetails();
+        });
+    }
+
+    //TODO: High Priority: Remove event bus pattern
+    @Subscribe
+    public void onBookmarksChanged(BookmarkChangedEvent bookmarkChangedEvent) {
+        Timber.d("Bookmarks Changed");
+        loadData();
+    }
+
+
     @Override
     protected void onResume() {
         super.onResume();
@@ -298,10 +316,8 @@ protected void onResume() {
 
         gridLayoutManager.setSpanCount(spanCount);
 
-        speakerDetailsViewModel.getSpeaker(speakerName).observe(this, speakerData -> {
-            selectedSpeaker = speakerData;
-            loadSpeakerDetails();
-        });
+        //TODO: Workaround. Needs fix during implementation of RealmLiveData
+        loadData();
     }
 
     @Override