Add assemble_cvd to com.android.virt

The tool will be used to compose OS payload images for the VMs.

Bug: 172414324
Test: m com.android.virt
Change-Id: I61a9cc1c2da22f19f75b9df5b71e30589a71203f
diff --git a/apex/Android.bp b/apex/Android.bp
index 3eaae4e..505cccd 100644
--- a/apex/Android.bp
+++ b/apex/Android.bp
@@ -22,6 +22,7 @@
             ],
         },
     },
+    binaries: ["assemble_cvd"],
 
     min_sdk_version: "S",
 }