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/encString.spec.ts

@@ -192,4 +192,12 @@ describe("EncString", () => {
       cryptoService.received().decryptToUtf8(encString, key);
     });
   });
+
+  describe("toJSON", () => {
+    it("Should be represented by the encrypted string", () => {
+      const encString = new EncString(EncryptionType.AesCbc256_B64, "data", "iv");
+
+      expect(encString.toJSON()).toBe(encString.encryptedString);
+    });
+  });
 });