add hdmi cec hal

* Based on AOSP yukawa HDMI-CEC HAL
  https://android.googlesource.com/device/amlogic/yukawa/+/refs/heads/main/hal/hdmicec/

cec/Android.bp

@@ -0,0 +1,17 @@
+// Copyright (C) 2019 The Android Open-Source Project
+// Copyright (C) 2021-2022 KonstaKANG
+//
+// SPDX-License-Identifier: Apache-2.0
+
+cc_library_shared {
+    name: "hdmi_cec.rpi",
+    relative_install_path: "hw",
+    proprietary: true,
+    srcs: ["hdmi_cec.c"],
+    cflags: ["-Werror"],
+    shared_libs: [
+        "liblog",
+        "libcutils",
+        "libhardware",
+    ],
+}