Fixed Android warnings

src/SDL.c

@@ -41,14 +41,15 @@
 #include "SDL_log_c.h"
 #include "SDL_properties_c.h"
 #include "audio/SDL_sysaudio.h"
+#include "camera/SDL_camera_c.h"
 #include "cpuinfo/SDL_cpuinfo_c.h"
-#include "video/SDL_video_c.h"
 #include "events/SDL_events_c.h"
 #include "haptic/SDL_haptic_c.h"
 #include "joystick/SDL_gamepad_c.h"
 #include "joystick/SDL_joystick_c.h"
 #include "sensor/SDL_sensor_c.h"
-#include "camera/SDL_camera_c.h"
+#include "stdlib/SDL_getenv_c.h"
+#include "video/SDL_video_c.h"
 
 #define SDL_INIT_EVERYTHING ~0U
 
@@ -58,7 +59,6 @@
 extern int SDL_HelperWindowCreate(void);
 extern int SDL_HelperWindowDestroy(void);
 #endif
-extern void SDL_FreeEnvironmentMemory(void);
 
 #ifdef SDL_BUILD_MAJOR_VERSION
 SDL_COMPILE_TIME_ASSERT(SDL_BUILD_MAJOR_VERSION,

src/events/SDL_mouse.c

@@ -404,7 +404,7 @@ SDL_Mouse *SDL_GetMouse(void)
     return &SDL_mouse;
 }
 
-SDL_MouseButtonFlags SDL_GetMouseButtonState(SDL_Mouse *mouse, SDL_MouseID mouseID, SDL_bool include_touch)
+static SDL_MouseButtonFlags SDL_GetMouseButtonState(SDL_Mouse *mouse, SDL_MouseID mouseID, SDL_bool include_touch)
 {
     int i;
     SDL_MouseButtonFlags buttonstate = 0;

src/stdlib/SDL_getenv.c

@@ -20,6 +20,8 @@
 */
 #include "SDL_internal.h"
 
+#include "SDL_getenv_c.h"
+
 #if defined(SDL_PLATFORM_WIN32) || defined(SDL_PLATFORM_WINGDK)
 #include "../core/windows/SDL_windows.h"
 #endif

src/stdlib/SDL_getenv_c.h

@@ -0,0 +1,23 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2024 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+extern void SDL_FreeEnvironmentMemory(void);