[PM-1400] Update IconComponent to use OnPush ChangeDetection (#5181)

* Add disableFavicon$ to stateService

* Change IconComponent's ChangeDetectionStrategy and use disableFavicon$ observable

* Only get first result from disableFavicon observable

* Move disabledFavicon$ to SettingsService

* Update usage of disableFavicon to use SettingsService

* Remove getting and setting of disabledFavicon on login

* Settings service observable adjustments

* Fix for popup initially having a null value for the disableFavicon setting in settingsService

* Move disabledFavicon$ subscription to ngOnInit

* feat: experiment with observables

* Remove SettingsService from browser app component

* Fix storybook changes

* Update apps/web/src/app/vault/components/vault-items/vault-items.stories.ts

Co-authored-by: Andreas Coroiu <acoroiu@bitwarden.com>

* Fix mock function signature

---------

Co-authored-by: Andreas Coroiu <andreas.coroiu@gmail.com>
Co-authored-by: Andreas Coroiu <acoroiu@bitwarden.com>

libs/angular/src/vault/components/icon.component.html

@@ -1,11 +1,16 @@
 <div class="icon" aria-hidden="true">
-  <img
-    [src]="image"
-    appFallbackSrc="{{ fallbackImage }}"
-    *ngIf="imageEnabled && image"
-    alt=""
-    decoding="async"
-    loading="lazy"
-  />
-  <i class="tw-text-muted bwi bwi-lg {{ icon }}" *ngIf="!imageEnabled || !image"></i>
+  <ng-container *ngIf="data$ | async as data">
+    <img
+      [src]="data.image"
+      [appFallbackSrc]="data.fallbackImage"
+      *ngIf="data.imageEnabled && data.image"
+      alt=""
+      decoding="async"
+      loading="lazy"
+    />
+    <i
+      class="tw-text-muted bwi bwi-lg {{ data.icon }}"
+      *ngIf="!data.imageEnabled || !data.image"
+    ></i>
+  </ng-container>
 </div>