Add an optional lineSize parameter to the Activity indicator

[matiaspan]

Is your feature request related to a problem? Please describe.
When using the activity indicator in a large size the default line width doesn't look right for my project (and I imagine for most projects it might be the same)

Describe the solution you'd like
Added an optional lineSize parameter to the component that lets you specify exactly what size you want.

Describe alternatives you've considered
There aren't really any other options.

Additional context