[PM-7562] Add DuckDuckGo back to State Service (#8791)

* Add ddg back to state service

* Remove getters

libs/common/src/platform/abstractions/state.service.ts

@@ -74,6 +74,13 @@ export abstract class StateService<T extends Account = Account> {
    * Used when Lock with MP on Restart is enabled
    */
   setPinKeyEncryptedUserKeyEphemeral: (value: EncString, options?: StorageOptions) => Promise<void>;
+  /**
+   * @deprecated For backwards compatible purposes only, use DesktopAutofillSettingsService
+   */
+  setEnableDuckDuckGoBrowserIntegration: (
+    value: boolean,
+    options?: StorageOptions,
+  ) => Promise<void>;
   /**
    * @deprecated For migration purposes only, use getUserKeyMasterKey instead
    */