I am curious why Avast never contact me via email or through the Android app that this is a problem. Strangely enough, Lookout Security, an app I had uninstalled from my phone, did!!
Also, I am not finding any messages from Avast whether or not the Virus Scanner or any other part of the Avast app is providing any protection against Stagefright.
I consider Avast 100% remiss in this. And have to look at Lookout with a second consideration.