Canvas can no longer be really big

[ewpatton]

Describe the bug

Power users group: It used to be that the canvas could have really large width/height, but this is no longer the case. Making a large canvas crashes the app. This is due to the fact that in older versions of App Inventor we used software rendering but newer versions of App Inventor use hardware rendering. Hardware rendering places constraints on the size of resources drawn on the canvas object, and the background image violates those constraints in large Canvas components.

Affects

• Designer
• Blocks editor
• Companion
• Compiled apps
• Buildserver
• Debugging
• Other... (please describe)

Expected behavior

Large Canvas objects should not crash the companion (although at some point we will have OOM issues due to background image size). Existing apps that no longer work should resume working.

Steps to reproduce

1. Create a Canvas in a project. Set its width/height to something large like 2048x2048
2. Connect companion or install APK on your device