Don't assume OpenGL on Android

This prevents Vulkan from initializing by default.

Fixes https://github.com/libsdl-org/SDL/issues/10279

src/video/SDL_video.c

@@ -258,7 +258,7 @@ typedef struct
 
 static Uint32 SDL_DefaultGraphicsBackends(SDL_VideoDevice *_this)
 {
-#if (defined(SDL_VIDEO_OPENGL) && defined(SDL_PLATFORM_MACOS)) || (defined(SDL_PLATFORM_IOS) && !TARGET_OS_MACCATALYST) || defined(SDL_PLATFORM_ANDROID)
+#if (defined(SDL_VIDEO_OPENGL) && defined(SDL_PLATFORM_MACOS)) || (defined(SDL_PLATFORM_IOS) && !TARGET_OS_MACCATALYST)
     if (_this->GL_CreateContext) {
         return SDL_WINDOW_OPENGL;
     }