[Android] Stop calling eglSwapBuffers immediately. (#3076)

Since we're seeing ANRs at SCREEN_OFF where the rasterizer thread
appears to be hanging during eglSwapBuffers, this change attempts to
avoid those ANRs by immediately skip calls to eglSwapBuffers when a
surfaceDestroyed event is received, until a the next SurfaceCreated.
Since Cobalt uses GameActivity, those are received in calls to
OnNativeWindowDestroyed respectively OnNativeWindowCreated.

b/225209442

starboard/android/shared/android_main.cc

@@ -38,6 +38,9 @@
 namespace starboard {
 namespace android {
 namespace shared {
+
+atomic_bool g_block_swapbuffers;
+
 namespace {
 
 using ::starboard::shared::starboard::CommandLine;
@@ -314,13 +317,15 @@ void OnWindowFocusChanged(GameActivity* activity, bool focused) {
 }
 
 void OnNativeWindowCreated(GameActivity* activity, ANativeWindow* window) {
+  g_block_swapbuffers.store(false);
   if (g_app_running.load()) {
     ApplicationAndroid::Get()->SendAndroidCommand(
         AndroidCommand::kNativeWindowCreated, window);
   }
 }
 
 void OnNativeWindowDestroyed(GameActivity* activity, ANativeWindow* window) {
+  g_block_swapbuffers.store(true);
   if (g_app_running.load()) {
     ApplicationAndroid::Get()->SendAndroidCommand(
         AndroidCommand::kNativeWindowDestroyed);

starboard/android/shared/egl_swap_buffers.cc

@@ -16,14 +16,25 @@
 #include <GLES2/gl2.h>
 
 #include "starboard/android/shared/video_window.h"
+#include "starboard/common/atomic.h"
 #include "starboard/shared/gles/gl_call.h"
 
+namespace starboard {
+namespace android {
+namespace shared {
+extern atomic_bool g_block_swapbuffers;
+}  // namespace shared
+}  // namespace android
+}  // namespace starboard
+
 extern "C" {
 EGLBoolean __real_eglSwapBuffers(EGLDisplay dpy, EGLSurface surface);
 
 // This needs to be exported to ensure shared_library targets include it.
 SB_EXPORT_PLATFORM EGLBoolean __wrap_eglSwapBuffers(EGLDisplay dpy,
                                                     EGLSurface surface) {
+  if (starboard::android::shared::g_block_swapbuffers.load())
+    return;
   // Kick off the GPU while waiting for new player bounds to take effect.
   GL_CALL(glFlush());