Added Android Development and DevOps Bootcamp courses. (#7142)

* Update free-courses-en.md

Added CS194A course offered by Stanford. Teaches basic, foundational techniques for developing Android mobile applications and apply those toward building a single or multi page, networked Android application.

* Update free-courses-hi.md

* Update free-courses-hi.md

* Update free-courses-en.md

courses/free-courses-en.md

@@ -22,6 +22,7 @@
     * [NoSQL](#nosql)
     * [SQL](#sql)
 * [Deep Learning](#deep-learning)
+* [DevOps](#devops)
 * [Docker](#docker)
 * [Flutter](#flutter)
 * [Game Development](#game-development)
@@ -145,6 +146,7 @@
 * [Android Developer Fundamentals (Version 2) — Concepts](https://google-developer-training.github.io/android-developer-fundamentals-course-concepts-v2/index.html)
 * [Android Performance](https://www.udacity.com/course/android-performance--ud825) (Udacity)
 * [Build Native Mobile Apps with Flutter](https://www.udacity.com/course/build-native-mobile-apps-with-flutter--ud905) (Udacity)
+* [CS194A Android Development](https://www.youtube.com/playlist?list=PL7NYbSE8uaBDcLkbXsQADdvBnVbavonGn) - Rahul Pandey (Stanford)
 * [CS50 2019 - Android Track](https://www.youtube.com/playlist?list=PLhQjrBD2T381qULidYDKP55-4u1piASC1) - David J. Malan (Harvard OpenCourseWare)
 * [Developing Android Apps](https://www.udacity.com/course/new-android-fundamentals--ud851) (Udacity)
 * [Developing Android Apps with Kotlin](https://www.udacity.com/course/developing-android-apps-with-kotlin--ud9012) (Udacity)
@@ -365,6 +367,11 @@
 * [What is Deep Learning](https://www.udacity.com/course/deep-learning--ud730) (Udacity)
 
 
+### DevOps
+
+* [DevOps Bootcamp](https://www.youtube.com/playlist?list=PL9gnSGHSqcnoqBXdMwUTRod4Gi3eac2Ak) - Kunal Kushwaha
+
+
 ### Docker
 
 * [Docker](https://www.youtube.com/playlist?list=PLhW3qG5bs-L99pQsZ74f-LC-tOEsBp2rK) - Raghav Pal