Add Rust backend to audio common AIDL

Bug: 319474244
Test: build ok
Flag: EXEMPT HAL interface change
Change-Id: I2de2cd7ad0b2cc2d038af8c6bf510fa67aa69705

audio/aidl/Android.bp

@@ -64,6 +64,9 @@ aidl_interface {
             ],
             min_sdk_version: "31",
         },
+        rust: {
+            enabled: true,
+        },
     },
     versions_with_info: [
         {
@@ -112,6 +115,13 @@ cc_defaults {
     ],
 }
 
+rust_defaults {
+    name: "latest_android_hardware_audio_common_rust",
+    rustlibs: [
+        latest_android_hardware_audio_common + "-rust",
+    ],
+}
+
 aidl_interface_defaults {
     name: "latest_android_hardware_audio_common_import_interface",
     imports: [