PS-1133 Feature/mv3 browser observable memory caching (#3245)

* Create sessions sync structure

* Add observing to session-syncer

* Do not run syncer logic in decorator tests

* Extract test constants

* Change Observables to BehaviorSubject

* Move sendMessage to static method in BrowserApi

* Implement session sync

* only watch in manifest v3

* Use session sync on folder service

* Add array observable sync

* Bypass cache on update from message

* Create feature and dev flags for browser

* Protect development-only methods with decorator

* Improve todo comments for long-term residency

* Use class properties in init

* Do not reuse mocks

* Use json (de)serialization patterns

* Fix failing session storage in dev environment

* Split up complex EncString constructor

* Default false for decrypted session storage

* Try removing hydrate EncString method

* PR review

* PR test review

libs/common/spec/models/domain/folder.spec.ts

@@ -1,4 +1,5 @@
 import { FolderData } from "@bitwarden/common/models/data/folderData";
+import { EncString } from "@bitwarden/common/models/domain/encString";
 import { Folder } from "@bitwarden/common/models/domain/folder";
 
 import { mockEnc } from "../../utils";
@@ -38,4 +39,27 @@ describe("Folder", () => {
       revisionDate: new Date("2022-01-31T12:00:00.000Z"),
     });
   });
+
+  describe("fromJSON", () => {
+    jest.mock("@bitwarden/common/models/domain/encString");
+    const mockFromJson = (stub: any) => (stub + "_fromJSON") as any;
+    jest.spyOn(EncString, "fromJSON").mockImplementation(mockFromJson);
+
+    it("initializes nested objects", () => {
+      const revisionDate = new Date("2022-08-04T01:06:40.441Z");
+      const actual = Folder.fromJSON({
+        revisionDate: revisionDate.toISOString(),
+        name: "name",
+        id: "id",
+      });
+
+      const expected = {
+        revisionDate: revisionDate,
+        name: "name_fromJSON",
+        id: "id",
+      };
+
+      expect(actual).toMatchObject(expected);
+    });
+  });
 });