Fix cargo_embargo.json to match Android.bp.

Bug: http://b/339424309
Test: treehugger
Change-Id: I46c057643f0a48619de186d986208fba064cb448

cargo_embargo.json

diff --git a/cargo_embargo.json b/cargo_embargo.json
index dd2bfad..a2a6ffe 100644
--- a/cargo_embargo.json
+++ b/cargo_embargo.json
@@ -2,6 +2,7 @@
   "apex_available": [
     "//apex_available:platform",
     "com.android.compos",
+    "com.android.microfuchsia",
     "com.android.virt"
   ],
   "run_cargo": false