The production release crashes with a java.lang.ClassNotFoundException: com.google.android.filament.NioUtils about devfestarmap

[MrCsabaToth]

Looks like this issue:

• google-ar/arcore-android-sdk#1232
• https://stackoverflow.com/questions/67685693/jni-detected-error-in-application-jni-newglobalref-called-with-pending-exceptio
• SceneView/sceneform-android#91

[MrCsabaToth]

Created an activation image page for testing:

• https://gdgfresno.com/DevfestARMap/img/devrel.png
• https://gdgfresno.com/DevfestARMap/activation.html

[MrCsabaToth]

I didn't see the pass down proguard rule from Filament in the app's build artifacts so I added the current Filament ProGuard rules and additional rules for the filament.NioUtils class to be on the safe side.

[MrCsabaToth]

The app's size grew from sub 3MB to above 6MB, I'm not sure if this is due to ThomasGorisse's SceneForm features (for example better glb animation handling and a ton of stuff), or part of the ProGuard rules to keep in classes, or both. But at least the app won't crash.