Create a skeleton Rust broadcast radio  HAL

This is to prove that rust broadcast radio HAL can be built and can
run. The skeleton Rust broadcast radio HAL will return UNKNOWN_ERROR
for all APIs.

Bug: 335514024
Test: m android.hardware.broadcastradio-rust-service
Change-Id: I763175b984c130d75cdc9506ba92c8c1b44338b5
diff --git a/broadcastradio/aidl/rust_impl/src/main.rs b/broadcastradio/aidl/rust_impl/src/main.rs
new file mode 100644
index 0000000..c0bc055
--- /dev/null
+++ b/broadcastradio/aidl/rust_impl/src/main.rs
@@ -0,0 +1,33 @@
+/*
+ * Copyright (C) 2024 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.
+ */
+ mod default_broadcastradio_hal;
+
+use android_hardware_broadcastradio::aidl::android::hardware::broadcastradio::IBroadcastRadio::BnBroadcastRadio;
+use crate::default_broadcastradio_hal::DefaultBroadcastRadioHal;
+
+fn main() {
+    binder::ProcessState::start_thread_pool();
+    let my_service = DefaultBroadcastRadioHal;
+    let service_name = "android.hardware.broadcastradio.IBroadcastRadio/amfm";
+    let my_service_binder = BnBroadcastRadio::new_binder(
+        my_service,
+        binder::BinderFeatures::default(),
+    );
+    binder::add_service(service_name, my_service_binder.as_binder())
+    		.expect(format!("Failed to register {}?", service_name).as_str());
+    // Does not return.
+    binder::ProcessState::join_thread_pool()
+}