AIDL: disable Rust explicitly

Now that it's enabled by default.

Because this uses FDs.

Bug: 321267339
Test: m
Change-Id: I62aff434f4b94bb440471e57ee8aef4965d641a6

Author: Steven Moreland

libs/binder/tests/Android.bp

@@ -100,9 +100,14 @@ aidl_interface {
             enabled: true,
             platform_apis: true,
         },
+
+        // TODO: switch from FileDescriptor to ParcelFileDescriptor
         ndk: {
             enabled: false,
         },
+        rust: {
+            enabled: false,
+        },
     },
 }