Removed SDL_AndroidOpenURL, added SDL_OpenURL.

Still needs to be wired into Xcode and Visual Studio projects.

test/testurl.c

@@ -0,0 +1,36 @@
+/*
+  Copyright (C) 1997-2020 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.
+*/
+#include "SDL.h"
+
+int main(int argc, char **argv)
+{
+    int i;
+    if (SDL_Init(SDL_INIT_VIDEO) == -1) {
+        fprintf(stderr, "SDL_Init failed: %s\n", SDL_GetError());
+        return 1;
+    }
+
+    for (i = 1; i < argc; i++) {
+        const char *url = argv[i];
+        SDL_Log("Opening '%s' ...", url);
+        if (SDL_OpenURL(url) == 0) {
+            SDL_Log("  success!");
+        } else {
+            SDL_Log("  failed! %s", SDL_GetError());
+        }
+    }
+
+    SDL_Quit();
+    return 0;
+}
+
+/* vi: set ts=4 sw=4 expandtab: */