[PM-6658] Migrate disableFavicon to Domain Settings service and remove Settings service (#8333)

* add showFavicons to domain settings

* replace usages of disableFavicon with showFavicons via the domain settings service and remove/replace settings service

* create migration for disableFavicon

* cleanup

libs/common/src/services/settings.service.ts

@@ -1,40 +0,0 @@
-import { BehaviorSubject, concatMap } from "rxjs";
-
-import { SettingsService as SettingsServiceAbstraction } from "../abstractions/settings.service";
-import { StateService } from "../platform/abstractions/state.service";
-import { Utils } from "../platform/misc/utils";
-
-export class SettingsService implements SettingsServiceAbstraction {
-  protected _disableFavicon = new BehaviorSubject<boolean>(null);
-
-  disableFavicon$ = this._disableFavicon.asObservable();
-
-  constructor(private stateService: StateService) {
-    this.stateService.activeAccountUnlocked$
-      .pipe(
-        concatMap(async (unlocked) => {
-          if (Utils.global.bitwardenContainerService == null) {
-            return;
-          }
-
-          if (!unlocked) {
-            return;
-          }
-
-          const disableFavicon = await this.stateService.getDisableFavicon();
-
-          this._disableFavicon.next(disableFavicon);
-        }),
-      )
-      .subscribe();
-  }
-
-  async setDisableFavicon(value: boolean) {
-    this._disableFavicon.next(value);
-    await this.stateService.setDisableFavicon(value);
-  }
-
-  getDisableFavicon(): boolean {
-    return this._disableFavicon.getValue();
-  }
-}