fix(upload-list): improve performance, notify observers on main thread

Signed-off-by: alperozturk96 <alper_ozturk@proton.me>

Author: alperozturk96

app/src/main/java/com/owncloud/android/datamodel/UploadsStorageManager.java

@@ -18,6 +18,8 @@
 import android.content.ContentResolver;
 import android.content.ContentValues;
 import android.database.Cursor;
+import android.os.Handler;
+import android.os.Looper;
 
 import com.nextcloud.client.account.CurrentAccountProvider;
 import com.nextcloud.client.account.User;
@@ -214,8 +216,10 @@ private void updateUploadStatus(long id, UploadStatus status, UploadResult resul
      */
     public void notifyObserversNow() {
         Log_OC.d(TAG, "notifyObserversNow");
-        setChanged();
-        notifyObservers();
+        new Handler(Looper.getMainLooper()).post(() -> {
+            setChanged();
+            notifyObservers();
+        });
     }
 
     /**