fix: add missing upload for inbound group sessions on dehydrated devices

Fixes: famedly#1624

Signed-off-by: The one with the braid <info@braid.business>

lib/msc_extensions/msc_3814_dehydrated_devices/msc_3814_dehydrated_devices.dart

@@ -169,6 +169,7 @@ extension DehydratedDeviceHandler on Client {
         userDeviceKeys[userID]!.deviceKeys[device]!,
       ];
       await this.encryption?.crossSigning.sign(keysToSign);
+      encryption.keyManager.startAutoUploadKeys();
     } finally {
       await encryption.dispose();
     }