Added Android Meta Quest Support

runtime/include/vr/openxr_android.h

@@ -0,0 +1,41 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#pragma once
+
+#if defined(MKW_ENABLE_OPENXR) && defined(__ANDROID__)
+
+#include "vr/openxr_runtime.h"
+
+#include <string>
+
+namespace mkw::vr {
+
+// Android-specific OpenXR bootstrap.
+//
+// The Khronos loader on Android must be told which JavaVM and Context it lives
+// in before any other OpenXR entry point is called (xrInitializeLoaderKHR), and
+// xrCreateInstance must chain an XrInstanceCreateInfoAndroidKHR naming the
+// activity. Both come from SDL's Android glue (the SDLActivity that hosts the
+// runtime), so no extra JNI surface is needed. DolphinXR found that the loader
+// context must be the *activity*, not the application context: with a plain
+// application context the Quest runtime never leaves XR_SESSION_STATE_IDLE.
+//
+// Call order: OpenXRAndroidInitializeLoader() once, before OpenXRRuntime::Initialize;
+// then pass OpenXRAndroidInstanceCreateNext() as OpenXRConfig::instance_create_next.
+bool OpenXRAndroidInitializeLoader(OpenXRLogCallback logger, std::string* error);
+const void* OpenXRAndroidInstanceCreateNext();
+
+// Optional XR_KHR_android_thread_settings hint for the calling thread. Failure
+// is not an error: some Quest runtime builds advertise the extension but reject
+// particular thread types, so the caller only logs the outcome.
+enum class OpenXRAndroidThreadType {
+    ApplicationMain,
+    ApplicationWorker,
+    RendererMain,
+    RendererWorker,
+};
+bool OpenXRAndroidRegisterThread(OpenXRRuntime& runtime, OpenXRAndroidThreadType type);
+
+} // namespace mkw::vr
+
+#endif // defined(MKW_ENABLE_OPENXR) && defined(__ANDROID__)