RMMV > Deploy to Web > Wrap in Android Client
Tested the web deployment on a web server and the Quests worked fine there, so the issue is most likely in how the plugin interacts with the Android Client or how the package is built in Android Studio. I was thinking it's the fact that the Quest Journal uses the Message Core Plugin to convert HTML info screen text, so I'm going to try to rebuild w/o Message Core and see what happens, but figured I'd start this post to get feelers if others have any idea.
Update: Tried with Message Core disabled and still shows a black screen.