rust: Disable dylib vendor modules

These modules do not currently build correctly. Support is planned but
not complete.

Bug: 204303985
Test: Presubmit + build `rust_library` with `vendor_available: true`
Change-Id: Iac7df9fe0d4eaa9a5ec0ff5a9cd5670af23df2a6
diff --git a/rust/library.go b/rust/library.go
index 07843fe..bb2e83f 100644
--- a/rust/library.go
+++ b/rust/library.go
@@ -681,6 +681,12 @@
 			}
 
 			variation := v.(*Module).ModuleBase.ImageVariation().Variation
+			if strings.HasPrefix(variation, cc.VendorVariationPrefix) {
+				// TODO(b/204303985)
+				// Disable vendor dylibs until they are supported
+				v.(*Module).Disable()
+			}
+
 			if strings.HasPrefix(variation, cc.VendorVariationPrefix) &&
 				m.HasVendorVariant() &&
 				!snapshot.IsVendorProprietaryModule(mctx) &&