Feature Request: Get size for all modules

[chao2zhang]

Is your feature request related to a problem? Please describe. As we are creating more dynamic modules in the app, it now becomes challenging to track the size of all modules when they are introduced.

Describe the solution you'd like In get-size total command, support --all-modules to calculate the size of all install-time and downloadable modules.

Describe alternatives you've considered The alternative is to list each module specifically, which is not scalable for large organizations. Note: #123 describes a different scenario and is a different request.

[benjaminRomano]

:+1: This would be useful in the context of my feature request as well. The solution I used in my fork adds quite a bit of overhead as an invocation of bundletool is quite slow and we have added quite a bit more feature modules.