Add assemble_cvd to com.android.virt

assemble_cvd directly or indirectly depends on these modules. To add
assemble_cvd to the com.anroid.virt APEX, these modules are marked as
being available to the APEX.

Bug: 174639526
Test: m com.android.virt
Change-Id: Id3b2989a9f038a1cdc769a2021a116cf09ab1b15

libsparse/Android.bp

@@ -28,6 +28,10 @@ cc_library {
             enabled: true,
         },
     },
+    apex_available: [
+        "//apex_available:platform",
+        "com.android.virt",
+    ],
 }
 
 cc_binary {