lights: Re-write example service in Rust

Add a re-implementation of the Lights HAL example service in Rust. This
was originally written as the start of a Cuttlefish specific
implementation of this service, but it's simple / small enough that
replacing the current Android C++ one with it shouldn't bring in any
trouble while providing yet another Rust service example to the tree.

Tested: built VtsHalLightTargetTest and ran in Cuttlefish
Bug: 286106270
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:a796fb113c405838424e61fd0b4cd6e0ef86c5a7)

Change-Id: I01eaf9ce7c6086e1429f52ff4f7f92cebc5360b6
diff --git a/light/aidl/default/Android.bp b/light/aidl/default/Android.bp
index 7920503..285329e 100644
--- a/light/aidl/default/Android.bp
+++ b/light/aidl/default/Android.bp
@@ -7,19 +7,17 @@
     default_applicable_licenses: ["hardware_interfaces_license"],
 }
 
-cc_binary {
+rust_binary {
     name: "android.hardware.lights-service.example",
     relative_install_path: "hw",
     init_rc: ["lights-default.rc"],
     vintf_fragments: ["lights-default.xml"],
     vendor: true,
-    shared_libs: [
-        "libbase",
-        "libbinder_ndk",
-        "android.hardware.light-V2-ndk",
+    rustlibs: [
+        "liblogger",
+        "liblog_rust",
+        "libbinder_rs",
+        "android.hardware.light-V2-rust",
     ],
-    srcs: [
-        "Lights.cpp",
-        "main.cpp",
-    ],
+    srcs: [ "main.rs" ],
 }