SDL_GetBasePath() returns NULL on Android instead of ./assets/

[corentin35000]

On Android, calling SDL_GetBasePath() returns NULL instead of pointing to the expected ./assets/ directory.

const char* path = SDL_GetBasePath();
RC2D_log(RC2D_LOG_INFO, "Base path: %s\n", path); // path is NULL on Android

According to the documentation, SDL_GetBasePath() should return the directory where the application resides, which is usually ./assets/ on Android.
This behavior disrupts code that uses SDL_GetBasePath() as a fallback when using SDL_OpenTitleStorage(NULL, 0);.

This issue may be related to:
(see #13929).

Steps to reproduce this issue:

Build and run a simple SDL3 application on Android.

Call SDL_GetBasePath().

Note: The method returns NULL.

Expected result:
SDL_GetBasePath() should return a valid path (e.g., ./assets/) on Android.

Actual result:
Always returns NULL.

Note: I took some notes at the time on SDL2; SDL_GetBasePath() already returned NULL at the time, but since the Storage API is supposed to support most platforms to abstract this away, I find it restrictive.