FrontendCommon: Use SDL_InitSubSystem() for lazy initialization

src/frontend-common/sdl_initializer.cpp

@@ -0,0 +1,21 @@
+#include "sdl_initializer.h"
+#include "common/assert.h"
+#include <SDL.h>
+
+namespace FrontendCommon {
+static bool s_sdl_initialized = false;
+
+void EnsureSDLInitialized()
+{
+  if (s_sdl_initialized)
+    return;
+
+  if (SDL_Init(0) < 0)
+  {
+    Panic("SDL_Init(0) failed");
+    return;
+  }
+
+  s_sdl_initialized = true;
+}
+} // namespace FrontendCommon