Android gradle plugin, SDL 2.30.0, devkitpro build image

[scribam]

There is an issue with the latest devkitpro docker image that's why I locked the version.

• https://devkitpro.org/viewtopic.php?f=42&t=9532&sid=edf39fafcceeba2fa54876ae27f4b6af
• Logs: https://github.com/scribam/flycast/actions/runs/7766044323/job/21181417489