[Android] Fixes Bug 2041 - can't get SDL_QUIT event...

Thanks to Denis Bernard!

Also, changed the Android manifest so the app doesn't quit with orientation
changes, and made testgles.c exit properly on Android.

test/testgles.c

@@ -335,7 +335,9 @@ main(int argc, char *argv[])
         SDL_Log("%2.2f frames per second\n",
                ((double) frames * 1000) / (now - then));
     }
+#if !defined(__ANDROID__)
     quit(0);
+#endif        
     return 0;
 }