Migrate to cargo_embargo.

Bug: 293289578
Test: Ran cargo_embargo, compared Android.bp
Change-Id: I1d5b9ac6586583358bb672751b5954bbbd48e0c6
diff --git a/cargo_embargo.json b/cargo_embargo.json
new file mode 100644
index 0000000..7f14879
--- /dev/null
+++ b/cargo_embargo.json
@@ -0,0 +1,7 @@
+{
+  "apex_available": [
+    "//apex_available:platform",
+    "com.android.virt"
+  ],
+  "tests": true
+}