Use buildSrc to manage dependencies

[etonotieno]

Is your feature request related to a problem? Please describe.
Managing dependencies and versions in the current set up is difficult

Describe the solution you'd like
Instead of using the shared_dependencies.gradle file, dependencies can be migrated to the buildSrc folder and shared across modules.

Additional context
AndroidX libraries use buildSrc to manage dependencies.

[jumaallan]

I love this idea 🚀