void update(@NonNull final ApplicationKeyDao dao, @NonNull final ApplicationKey applicationKey) {
        databaseWriteExecutor.execute(() -> dao.update(applicationKey));
    }
Override the onOpen method to populate the database.
For this sample, we clear the database every time it is created or opened.
<p>
If you want to populate the database only when the database is created for the 1st time,
override RoomDatabase.Callback()#onCreate
mesh/src/main/java/no/nordicsemi/android/mesh/MeshNetworkDb.java