Add option to enable to-device-encryption (#3167)

* enable to-device-encryption

* add logging for key provider

* make rooms encrypted

* add dev setting to choose to-device or room encryption

* add indicator when to-device is used.

src/livekit/useLiveKit.ts

@@ -49,11 +49,14 @@ export function useLiveKit(
     if (e2eeSystem.kind === E2eeType.NONE) return undefined;
 
     if (e2eeSystem.kind === E2eeType.PER_PARTICIPANT) {
+      logger.info("Created MatrixKeyProvider (per participant)");
       return {
         keyProvider: new MatrixKeyProvider(),
         worker: new E2EEWorker(),
       };
     } else if (e2eeSystem.kind === E2eeType.SHARED_KEY && e2eeSystem.secret) {
+      logger.info("Created ExternalE2EEKeyProvider (shared key)");
+
       return {
         keyProvider: new ExternalE2EEKeyProvider(),
         worker: new E2EEWorker(),