Gradle Version Catalog support, crash fixes, allow landscape orientation, improve error messages

[dzolnai]

• Adds support for Android Hedgehog
• Uses Gradle Version Catalog for determining dependencies
• Allows the use of landscape orientation throughout the app
• Improves some common error messages to be less interrupting and more understandable for non-technical users
• Fixes a crash which could happen on older devices, where the common library would send updates to the app even if it was destroyed.
• Fixes a crash in the OpenVPN library which would happen when the user was trying to connect to multiple profiles at the same time.