RFC - Move to CompositeBuilds from buildSrc (WIP)

[anmolvermamm]

Drawback of buildSrc

Any change inside buildSrc completely invalidates the build cache. It also invalidates remote build cache, in instances when you are using it. Whilst it’s not really a problem for small projects, big ones with hundreds of modules are affected badly. On the other hand, changes in Gradle script files don’t invalidate the cache but merely invalidate some tasks.

https://medium.com/bumble-tech/how-to-use-composite-builds-as-a-replacement-of-buildsrc-in-gradle-64ff99344b58

https://docs.gradle.org/current/userguide/composite_builds.html

[vibhuti-shah-mutualmobile]

Looks good