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/broadcastradio-rust-service.rc b/broadcastradio/aidl/rust_impl/broadcastradio-rust-service.rc
new file mode 100644
index 0000000..4dad616
--- /dev/null
+++ b/broadcastradio/aidl/rust_impl/broadcastradio-rust-service.rc
@@ -0,0 +1,5 @@
+service vendor.broadcastradio-default /vendor/bin/hw/android.hardware.broadcastradio-service.default
+    interface aidl android.hardware.broadcastradio.IBroadcastRadio/amfm
+    class hal
+    user audioserver
+    group audio