Clear old group rings on startup.

app/src/main/java/org/thoughtcrime/securesms/ApplicationContext.java

@@ -211,6 +211,7 @@ public class ApplicationContext extends MultiDexApplication implements AppForegr
                             .addPostRender(StoryOnboardingDownloadJob.Companion::enqueueIfNeeded)
                             .addPostRender(PnpInitializeDevicesJob::enqueueIfNecessary)
                             .addPostRender(() -> ApplicationDependencies.getExoPlayerPool().getPoolStats().getMaxUnreserved())
+                            .addPostRender(() -> SignalDatabase.groupCallRings().removeOldRings())
                             .execute();
 
     Log.d(TAG, "onCreate() took " + (System.currentTimeMillis() - startTime) + " ms");