cec: add rpi hal implementation

* TODO: Convert to AIDL.

cec/HdmiCecPort.h

@@ -1,5 +1,6 @@
 /*
  * Copyright (C) 2021 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.
@@ -13,6 +14,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+
 #include <android/hardware/tv/cec/1.0/IHdmiCec.h>
 
 namespace android {