Add tests that boot old android images

Add images used in Android 16 to boot in latest versions of Android.
Image taken from out/target/*/apex/com.android.virt.apex, process documented in bug.

Bug: 360388014
Test: atest old_images_avf_test
Change-Id: Iac932643c4a9f875220d6e2f2eb6faba9a739bd2
diff --git a/libs/libavf/Android.bp b/libs/libavf/Android.bp
index b583e21..c958796 100644
--- a/libs/libavf/Android.bp
+++ b/libs/libavf/Android.bp
@@ -10,7 +10,10 @@
     source_stem: "bindings",
     bindgen_flags: ["--default-enum-style rust"],
     apex_available: ["com.android.virt"],
-    visibility: ["//packages/modules/Virtualization/tests/vts"],
+    visibility: [
+        "//packages/modules/Virtualization/tests/vts",
+        "//packages/modules/Virtualization/tests/old_images_avf_test",
+    ],
 }
 
 rust_defaults {