Log undecryptable to-device events

Listen for the new undecryptable to-device event event and log
events for it in Posthog & Sentry, and make it visible in the
call flow diagram.

src/PosthogAnalytics.ts

@@ -28,6 +28,7 @@ import {
   SignupTracker,
   MuteCameraTracker,
   MuteMicrophoneTracker,
+  UndecryptableToDeviceEventTracker,
 } from "./PosthogEvents";
 import { Config } from "./config/Config";
 import { getUrlParams } from "./UrlParams";
@@ -415,4 +416,5 @@ export class PosthogAnalytics {
   public eventLogin = new LoginTracker();
   public eventMuteMicrophone = new MuteMicrophoneTracker();
   public eventMuteCamera = new MuteCameraTracker();
+  public eventUndecryptableToDevice = new UndecryptableToDeviceEventTracker();
 }