NullPointerException in ObservationListActivity.refreshAnnouncements

[kueda]

https://console.firebase.google.com/u/0/project/inaturalist-ios/crashlytics/app/android:org.inaturalist.android/issues/98a44b4a66767ed4bbfa3ce4faaf8640

Fatal Exception: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.view.ViewGroup.setVisibility(int)' on a null object reference
       at org.inaturalist.android.ObservationListActivity.refreshAnnouncements(ObservationListActivity.java:1928)
       at org.inaturalist.android.ObservationListActivity.onOptionsItemSelected(ObservationListActivity.java:1063)
       at android.app.Activity.onMenuItemSelected(Activity.java:4532)

[kueda]

Still happening in 1.35.3: https://console.firebase.google.com/u/0/project/inaturalist-ios/crashlytics/app/android:org.inaturalist.android/issues/98a44b4a66767ed4bbfa3ce4faaf8640?time=last-seven-days&types=crash&versions=1.35.3%20(617)&sessionEventKey=6722409601DA00011B1B10BCC65FB367_2010018973233806215