Advanced Android in Kotlin: Notifications 1.1 [Step #][description]

[wallenr]

Describe the problem
A clear and concise description of what the problem is.
The code described in the tutorial does not match the code provided from github
We are asked to download (or clone) a copy of the master branch ( I did both) the master
already contains the completed tasks we are asked to do through the exercise. Additionally, it refers
to some TODO items that are not marked in the code

In which lesson and step of the codelab can this issue be found?
Lesson number + step number. (e.g., Lesson 1.1, Step 1.3)
Advanced Android in Kotlin 01,1 Task 4 all steps
How to reproduce?
What are the exact steps to reproduce the problem?
Download the git as requested by the project and follow along the steps
Versions

1. What version of Android Studio are you using? 4.1.2
2. What API level are you targeting? 30

Additional information
Add any other context about the problem here.

codelab: advanced-android-kotlin