Add Thread network HAL

Bug: b/203492431
Test: Build and run the VTS test and run otbr-agent on Android emulator.
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:b82b0478059dd6203f43d5917558e34fd4ed44d5)
Merged-In: If58b5a8c75e40376ae6c6e93554afe750496308b
Change-Id: If58b5a8c75e40376ae6c6e93554afe750496308b
diff --git a/threadnetwork/aidl/default/service.hpp b/threadnetwork/aidl/default/service.hpp
new file mode 100644
index 0000000..4137049
--- /dev/null
+++ b/threadnetwork/aidl/default/service.hpp
@@ -0,0 +1,40 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "mainloop.hpp"
+#include "thread_chip.hpp"
+
+namespace aidl {
+namespace android {
+namespace hardware {
+namespace threadnetwork {
+
+class Service : public ot::Posix::Mainloop::Source {
+  public:
+    Service(char* urls[], int numUrls);
+
+    void Update(otSysMainloopContext& context) override;
+    void Process(const otSysMainloopContext& context) override;
+    void startLoop(void);
+
+  private:
+    int mBinderFd;
+    std::vector<std::shared_ptr<ThreadChip>> mThreadChips;
+};
+}  // namespace threadnetwork
+}  // namespace hardware
+}  // namespace android
+}  // namespace aidl