Fixed making the EGL context current when resuming on Android

Make sure that we don't have the context cached as current on the current thread.

(cherry picked from commit 8b6da3c7017935932357a0decee84dc6167ace17)

src/video/android/SDL_androidevents.c

@@ -74,6 +74,7 @@ static void android_egl_context_restore(SDL_Window *window)
     if (window) {
         SDL_Event event;
         SDL_WindowData *data = (SDL_WindowData *)window->driverdata;
+        SDL_GL_MakeCurrent(window, NULL);
         if (SDL_GL_MakeCurrent(window, (SDL_GLContext)data->egl_context) < 0) {
             /* The context is no longer valid, create a new one */
             data->egl_context = (EGLContext)SDL_GL_CreateContext(window);