Probe for VirtIO PCI devices and allocate BARs.

Bug: 237249346
Test: Ran vmbase example
Change-Id: I6ce254a5d5a5740011ddc8efecd4052f40a2a53c
diff --git a/vmbase/example/Android.bp b/vmbase/example/Android.bp
index 505de6b..e0a87db 100644
--- a/vmbase/example/Android.bp
+++ b/vmbase/example/Android.bp
@@ -14,6 +14,7 @@
         "libdice_nostd",
         "liblibfdt",
         "liblog_rust_nostd",
+        "libvirtio_drivers",
         "libvmbase",
     ],
     static_libs: [