v2.3.2 - Android mod detection fix

Fixes

• Android: Mods now correctly detected and installed. The download and scan paths were pointing inside the read-only romfs assets directory (<data>/romfs/mods/) instead of the writable user directory (<data>/mods/). Since chdir() to the data root is already called at startup, all mod paths now use CWD-relative mods/ directly.
• Android: First-run setup now creates mods/, maps/, and characters/ subdirectories so you can drop content in before launching the game.