[vm_payload] Add bug link to sanitize section in Android.bp

Bug: 250854486
Test: N/A. Only comment change.
Change-Id: If220ab95a8e4dabda0b5cc178991c030a61d02ab
diff --git a/microdroid/vm_payload/Android.bp b/microdroid/vm_payload/Android.bp
index cca3639..8d78444 100644
--- a/microdroid/vm_payload/Android.bp
+++ b/microdroid/vm_payload/Android.bp
@@ -20,6 +20,8 @@
     apex_available: [
         "com.android.compos",
     ],
+    // The sanitize section below fixes the fuzzer build in b/256166339.
+    // TODO(b/250854486): Remove the sanitize section once the bug is fixed.
     sanitize: {
         address: false,
     },