Bug 1897319 - Stores icons for light/dark theme for Yelp suggestion

[dadaa]

Bugzilla: https://bugzilla.mozilla.org/show_bug.cgi?id=1897319
Jira: https://mozilla-hub.atlassian.net/browse/SNG-1515

We need to update the UI for Yelp suggestion.
One of them is to chnage the logo. But it has to change by the light/dark theme. Thus, make it to store both icons.

This PR did two things.

1. Stores both icons and change the related codes.
2. Introduce icon struct as same as PR Bug 1884816 - Expose icon information for suggestion as struct #6162 (A warning that said paramters are too complex in the first commit, it was a good chance :))

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Branch builds: add [firefox-android: branch-name] to the PR title.