feat(android): embed local node runtime

mobile/android/app/libnode/include/node/v8-microtask.h

@@ -0,0 +1,28 @@
+// Copyright 2021 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef INCLUDE_V8_MICROTASK_H_
+#define INCLUDE_V8_MICROTASK_H_
+
+namespace v8 {
+
+class Isolate;
+
+// --- Microtasks Callbacks ---
+using MicrotasksCompletedCallbackWithData = void (*)(Isolate*, void*);
+using MicrotaskCallback = void (*)(void* data);
+
+/**
+ * Policy for running microtasks:
+ *   - explicit: microtasks are invoked with the
+ *               Isolate::PerformMicrotaskCheckpoint() method;
+ *   - scoped: microtasks invocation is controlled by MicrotasksScope objects;
+ *   - auto: microtasks are invoked when the script call depth decrements
+ *           to zero.
+ */
+enum class MicrotasksPolicy { kExplicit, kScoped, kAuto };
+
+}  // namespace v8
+
+#endif  // INCLUDE_V8_MICROTASK_H_