Make libnativewindow_rs be available to the virt APEX

The virt APEX has crosvm in it. crosvm will have an Android display
backend which internally uses libnativewindow_rs.

Bug: 325929966
Test: m
Change-Id: I62db2bc4abb1fa552cbb60b8e90f3f8336819347
diff --git a/libs/nativewindow/rust/Android.bp b/libs/nativewindow/rust/Android.bp
index 90d0a8e..798d804 100644
--- a/libs/nativewindow/rust/Android.bp
+++ b/libs/nativewindow/rust/Android.bp
@@ -53,6 +53,10 @@
     },
     min_sdk_version: "VanillaIceCream",
     vendor_available: true,
+    apex_available: [
+        "//apex_available:platform",
+        "com.android.virt",
+    ],
 }
 
 rust_library {
@@ -77,6 +81,10 @@
     },
     min_sdk_version: "VanillaIceCream",
     vendor_available: true,
+    apex_available: [
+        "//apex_available:platform",
+        "com.android.virt",
+    ],
 }
 
 rust_test {
@@ -115,6 +123,10 @@
     },
     min_sdk_version: "VanillaIceCream",
     vendor_available: true,
+    apex_available: [
+        "//apex_available:platform",
+        "com.android.virt",
+    ],
 }
 
 rust_test {