hdmi: connection: add rpi specific aidl hal

* Needed for AIDL HDMI-CEC HAL to work. Some functions that were in the
  HIDL HDMI-CEC HAL have been moved to separate HDMI connection HAL in the
  AIDL versions. Only returns connection status of HDMI ports on Pi.
  onHotplugEvent is not implemented.
* Use hardware/interfaces/tv/hdmi/connection/aidl/ as reference.

hdmi/connection/HdmiConnection.h

@@ -0,0 +1,62 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ * Copyright (C) 2025 KonstaKANG
+ *
+ * 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 <aidl/android/hardware/tv/hdmi/connection/BnHdmiConnection.h>
+#include <aidl/android/hardware/tv/hdmi/connection/Result.h>
+#include <algorithm>
+#include <vector>
+
+using namespace std;
+
+namespace android {
+namespace hardware {
+namespace tv {
+namespace hdmi {
+namespace connection {
+namespace implementation {
+
+using ::aidl::android::hardware::tv::hdmi::connection::BnHdmiConnection;
+using ::aidl::android::hardware::tv::hdmi::connection::HdmiPortInfo;
+using ::aidl::android::hardware::tv::hdmi::connection::HdmiPortType;
+using ::aidl::android::hardware::tv::hdmi::connection::HpdSignal;
+using ::aidl::android::hardware::tv::hdmi::connection::IHdmiConnection;
+using ::aidl::android::hardware::tv::hdmi::connection::IHdmiConnectionCallback;
+using ::aidl::android::hardware::tv::hdmi::connection::Result;
+
+struct HdmiConnection : public BnHdmiConnection {
+    HdmiConnection();
+    ~HdmiConnection();
+    ::ndk::ScopedAStatus getPortInfo(std::vector<HdmiPortInfo>* _aidl_return) override;
+    ::ndk::ScopedAStatus isConnected(int32_t portId, bool* _aidl_return) override;
+    ::ndk::ScopedAStatus setCallback(
+            const std::shared_ptr<IHdmiConnectionCallback>& callback) override;
+    ::ndk::ScopedAStatus setHpdSignal(HpdSignal signal, int32_t portId) override;
+    ::ndk::ScopedAStatus getHpdSignal(int32_t portId, HpdSignal* _aidl_return) override;
+
+  private:
+    std::vector<HdmiPortInfo> mPortInfos;
+    std::vector<HpdSignal> mHpdSignal;
+
+    std::shared_ptr<IHdmiConnectionCallback> mCallback;
+};
+
+}  // namespace implementation
+}  // namespace connection
+}  // namespace hdmi
+}  // Namespace tv
+}  // namespace hardware
+}  // namespace android