[SG-882] [SG-58] Update desktop client to use new avatar color

[BrandonM-Bitwarden]

Type of change

- [ ] Bug fix
- [X] New feature development
- [ ] Tech debt (refactoring, code cleanup, dependency upgrades, etc)
- [ ] Build/deploy pipeline (DevOps)
- [ ] Other

Objective

With SG-58 introducing custom avatars, the user's selected colors should also show up on the desktop client.

Code changes

• account-switcher.component.html: added reference to color and bound properties.
• account-switcher.component.ts: added reference to state service and grabbed color from state values.

Screenshots

Before you submit

• Please add unit tests where it makes sense to do so (encouraged but not required)
• If this change requires a documentation update - notify the documentation team
• If this change has particular deployment requirements - notify the DevOps team

[trmartin4]

@BrandonM-Bitwarden I added SG-58 to the title so that it was also visible in Jira on the parent issue, to help QA know what to test.