Sub Configs

[ImToggle]

Description

Allows developers to group multiple configs inside a single config ( An example is in TestConfig_Test.java

Checklist

• [x] I made a clear description of what was changed
• [x] I stated why these changes were necessary
• [x] I updated documentation or said what needs to be updated
• [x] I made sure these changes are backwards compatible
• [x] This pull request is for one feature/bug fix