Add avf_build_flags_rust defaults to all rust_ modules

Bug: 298008251
Bug: 298012279
Bug: 298007909
Bug: 298008232
Test: builds
Test: presubmit
Change-Id: I5194d7043d5ac60b34162399557b3b657ead8969
diff --git a/authfs/src/fsverity/metadata/Android.bp b/authfs/src/fsverity/metadata/Android.bp
index 3df7519..c874c2b 100644
--- a/authfs/src/fsverity/metadata/Android.bp
+++ b/authfs/src/fsverity/metadata/Android.bp
@@ -5,6 +5,7 @@
 rust_bindgen {
     name: "libauthfs_fsverity_metadata_bindgen",
     wrapper_src: "metadata.hpp",
+    defaults: ["avf_build_flags_rust"],
     crate_name: "authfs_fsverity_metadata_bindgen",
     source_stem: "metadata_bindings",
     apex_available: ["com.android.virt"],
@@ -13,6 +14,7 @@
 rust_library {
     name: "libauthfs_fsverity_metadata",
     crate_name: "authfs_fsverity_metadata",
+    defaults: ["avf_build_flags_rust"],
     srcs: [
         "metadata.rs",
     ],