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/pvmfw/Android.bp b/pvmfw/Android.bp
index 1aa5935..523334f 100644
--- a/pvmfw/Android.bp
+++ b/pvmfw/Android.bp
@@ -48,6 +48,7 @@
     host_supported: true,
     // For now, only bootargs.rs is written to be conditionally compiled with std.
     srcs: ["src/bootargs.rs"],
+    defaults: ["avf_build_flags_rust"],
     test_suites: ["general-tests"],
     test_options: {
         unit_test: true,