Make libbinder_rs be available to the virt APEX

virtmanager is a first binder service in an APEX written in rust.
libbinder_rs has to be made available to the APEX.

Bug: 180297657
Test: m com.android.virt
Change-Id: I4235dd879a237271b6ddf125d370acc3c508ed59
diff --git a/libs/binder/rust/Android.bp b/libs/binder/rust/Android.bp
index fd5f2f5..f804f14 100644
--- a/libs/binder/rust/Android.bp
+++ b/libs/binder/rust/Android.bp
@@ -14,7 +14,11 @@
         darwin: {
             enabled: false,
         }
-    }
+    },
+    apex_available: [
+        "//apex_available:platform",
+        "com.android.virt",
+    ],
 }
 
 rust_library {
@@ -32,7 +36,11 @@
         darwin: {
             enabled: false,
         }
-    }
+    },
+    apex_available: [
+        "//apex_available:platform",
+        "com.android.virt",
+    ],
 }
 
 rust_bindgen {
@@ -78,6 +86,10 @@
             enabled: false,
         },
     },
+    apex_available: [
+        "//apex_available:platform",
+        "com.android.virt",
+    ],
 }
 
 rust_test {