Set auto on-a-call status (#34306)

* Support for reading m.call status

(well, the prefixed version)

* Abstract the details away in userStatusFromProfile

make the validate functions non-exported

* Write on on-=a-call status

* Add tests

* Move user call status logic to its own listener

* Move tests

* use vi rather than jest

* add more mocks

* call async

apps/web/test/unit-tests/stores/CallStore-test.ts

@@ -22,6 +22,7 @@ import {
 describe("CallStore", () => {
     let client: MockedObject<MatrixClient>;
     let room: Room;
+
     beforeEach(() => {
         enableCalls();
         const res = setUpClientRoomAndStores();