Add back Android demo module #64

[pxlmesh]

The following changes allow the Android and Desktop demo to work with latest Android Studio "Electric Eel | 2022.1.1 Patch 2".
Android Gradle Plugin Version: 7.4.2
Gradle Version: 8.0.2

The HTML demo isn't working, however, and is commented out in settings.gradle.
IBL Composer still appears to run.

Also, these changes are untested against IDEA or Eclipse IDEs.

[pxlmesh]

This revised commit allows Android, desktop and HTML demos to work without conflict. HTML tested using dist and superdev options without problems. IBL composer also still works. Gradle files were mostly modified and I tried to leave Eclipse/IntelliJ gradle sections intact. Not really sure what specifically fixed things.

Fixed/tested using Android Studio Flamingo | 2022.2.1 on Windows 11.

The following have not been tested.
IOS/Mac, Eclipse and IntelliJ IDEA.

ADDITIONAL NOTE re: AGP/Gradle VERSION
Using the most recent gdx-setup.jar to create a default HTML deployment, it appears that Android Gradle Plugin (AGP) and Gradle versions cannot be upgraded past a certain point. Based on this test, it appears to be an issue specific to HTML deployment only. This was also true for this gdx-gltf project due to HTML demo.

Android Gradle Plugin Version: 7.4.2 (the latest is 8.0.0 as of 4/27/2023)
Gradle Version: 7.5.1 (the latest is 8.1.1 as of 4/27/2023)