[PM-5559] Implement User Notification Settings state provider (#8032)

* create user notification settings state provider

* replace state service get/set disableAddLoginNotification and disableChangedPasswordNotification with user notification settings service equivalents

* migrate disableAddLoginNotification and disableChangedPasswordNotification global settings to user notification settings state provider

* add content script messaging the background for enableChangedPasswordPrompt setting

* Implementing feedback to provide on PR

* Implementing feedback to provide on PR

* PR suggestions cleanup

---------

Co-authored-by: Cesar Gonzalez <cgonzalez@bitwarden.com>

libs/common/src/autofill/services/user-notification-settings.service.ts

@@ -0,0 +1,60 @@
+import { map, Observable } from "rxjs";
+
+import {
+  USER_NOTIFICATION_SETTINGS_DISK,
+  GlobalState,
+  KeyDefinition,
+  StateProvider,
+} from "../../platform/state";
+
+const ENABLE_ADDED_LOGIN_PROMPT = new KeyDefinition(
+  USER_NOTIFICATION_SETTINGS_DISK,
+  "enableAddedLoginPrompt",
+  {
+    deserializer: (value: boolean) => value ?? true,
+  },
+);
+const ENABLE_CHANGED_PASSWORD_PROMPT = new KeyDefinition(
+  USER_NOTIFICATION_SETTINGS_DISK,
+  "enableChangedPasswordPrompt",
+  {
+    deserializer: (value: boolean) => value ?? true,
+  },
+);
+
+export abstract class UserNotificationSettingsServiceAbstraction {
+  enableAddedLoginPrompt$: Observable<boolean>;
+  setEnableAddedLoginPrompt: (newValue: boolean) => Promise<void>;
+  enableChangedPasswordPrompt$: Observable<boolean>;
+  setEnableChangedPasswordPrompt: (newValue: boolean) => Promise<void>;
+}
+
+export class UserNotificationSettingsService implements UserNotificationSettingsServiceAbstraction {
+  private enableAddedLoginPromptState: GlobalState<boolean>;
+  readonly enableAddedLoginPrompt$: Observable<boolean>;
+
+  private enableChangedPasswordPromptState: GlobalState<boolean>;
+  readonly enableChangedPasswordPrompt$: Observable<boolean>;
+
+  constructor(private stateProvider: StateProvider) {
+    this.enableAddedLoginPromptState = this.stateProvider.getGlobal(ENABLE_ADDED_LOGIN_PROMPT);
+    this.enableAddedLoginPrompt$ = this.enableAddedLoginPromptState.state$.pipe(
+      map((x) => x ?? true),
+    );
+
+    this.enableChangedPasswordPromptState = this.stateProvider.getGlobal(
+      ENABLE_CHANGED_PASSWORD_PROMPT,
+    );
+    this.enableChangedPasswordPrompt$ = this.enableChangedPasswordPromptState.state$.pipe(
+      map((x) => x ?? true),
+    );
+  }
+
+  async setEnableAddedLoginPrompt(newValue: boolean): Promise<void> {
+    await this.enableAddedLoginPromptState.update(() => newValue);
+  }
+
+  async setEnableChangedPasswordPrompt(newValue: boolean): Promise<void> {
+    await this.enableChangedPasswordPromptState.update(() => newValue);
+  }
+}