Update free-courses-en.md (#10652)

Added Courses by Florian Walther
MVVM Image Search App with Architecture Components & Retrofit
MVVM To-Do List App with Flow and Architecture Components

courses/free-courses-en.md

@@ -231,6 +231,8 @@
 * [Learn how to program: Android](https://www.learnhowtoprogram.com/android) - Epicodus Inc.
 * [Material design](https://material.io/guidelines/)
 * [Material Design for Android Developers](https://www.udacity.com/course/material-design-for-android-developers--ud862) (Udacity)
+* [MVVM Image Search App with Architecture Components & Retrofit](https://www.youtube.com/playlist?list=PLrnPJCHvNZuC_pEfFlZuTmjlY4T3DTtED) - Florian Walther ( Coding in flow )
+* [MVVM To-Do List App with Flow and Architecture Components](https://www.youtube.com/playlist?list=PLrnPJCHvNZuCfAe7QK2BoMPkv2TGM_b0E) - Florian Walther ( Coding in flow )
 * [Pokédex App with Jetpack Compose](https://www.youtube.com/playlist?list=PLQkwcJG4YTCTimTCpEL5FZgaWdIZQuB7m) - Phillipp Lackner
 * [Programming Mobile Applications for Android Handheld Systems pt. 1](https://www.coursera.org/course/android)
 * [Programming Mobile Applications for Android Handheld Systems pt. 2](https://www.coursera.org/course/androidpart2)