[SelectionList][Design Update] Update Checkbox Icons for Multi-Select

[grgia]

We moved this issue to be handled by this project. See here for context.

Problem

When users are presented with options on a screen today it can often be hard to know whether they can choose multiple options or just one. In some instances options don't even seem clickable.

Solution

Let's change selection lists (multi and single choice) to feature checkboxes and radio buttons:

As for the icon, a note is that the previous radio checkmark was 28px, where the new one is 20x20:

Notes:

• We have quite a few of these in the product so let's make test builds and do thorough testing
• There should be no active state background color anymore

[dubielzyk-expensify]

cc @Expensify/design for visibility

[grgia]

Bumped in slack

[grgia]

@zfurtak who's taking over this one? 🙏

[zfurtak]

I'll be starting this issue next week 😊