refresh omemo activity after failing to fetch keys due to lack of ids

src/main/java/eu/siacs/conversations/crypto/axolotl/AxolotlService.java

@@ -1085,6 +1085,7 @@ public class AxolotlService implements OnAdvancedStreamFeaturesLoaded {
 					}
 				}
 			} else {
+				mXmppConnectionService.keyStatusUpdated(FetchStatus.ERROR);
 				Log.w(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Have no target devices in PEP!");
 			}
 		}