Sync condition of microdroid_vbmeta with microdroid_super

Since conditions_default was opposite between microdroid_super and
microdroid_vbmeta, microdroid_vbmeta contains different information from
microdroid_super.

Additionally, since microdroid_vbmeta contains different information,
microdroid_vbmeta image after re-signing using sign_virt_apex was
different from before. This change will also fix mismatch of
microdroid_vbmeta's auxiliary block size while using sign_virt_apex

Bug: 307904471
Bug: 319235308

Test: lunch aosp_x86_64_phone-next-userdebug
Test: lunch aosp_x86_64_phone-trunk_staging-userdebug
Test: avbtool info_image --image <microdroid_vbmeta image before resigning>
Test: sign_virt_apex <private key> <microdroid_vbmeta image>
Test: avbtool info_image --image <micrdoroid_vbmeta image after resigning>

Change-Id: Ie57c0f5dee1ab1460105eac2540cfbab9775369d
diff --git a/microdroid/Android.bp b/microdroid/Android.bp
index ae89f79..233754a 100644
--- a/microdroid/Android.bp
+++ b/microdroid/Android.bp
@@ -391,7 +391,9 @@
     ],
     soong_config_variables: {
         release_avf_enable_vendor_modules: {
-            partitions: ["microdroid_vendor"],
+            conditions_default: {
+                partitions: ["microdroid_vendor"],
+            },
         },
     },
 }