Populate info.duration for audio & video file uploads (#11225)

* Improve m.file m.image m.audio m.video types

* Populate `info.duration` for audio & video file uploads

* Fix tests

* Iterate types

* Improve coverage

* Fix test

* Add small delay to stabilise cypress test

* Fix test idempotency

* Improve coverage

* Slow down

* iterate

src/models/RoomUpload.ts

@@ -16,11 +16,11 @@ limitations under the License.
 
 import { IEventRelation, UploadProgress } from "matrix-js-sdk/src/matrix";
 
-import { IEncryptedFile } from "../customisations/models/IMediaEventContent";
+import { EncryptedFile } from "../customisations/models/IMediaEventContent";
 
 export class RoomUpload {
     public readonly abortController = new AbortController();
-    public promise?: Promise<{ url?: string; file?: IEncryptedFile }>;
+    public promise?: Promise<{ url?: string; file?: EncryptedFile }>;
     private uploaded = 0;
 
     public constructor(