Add vbmeta.img to target images list

The vbmeta.img file contains digests of the "vendor side" of the mixing
process, i.e. boot/vendor/odm and should be assembled alongside those.

Bug: 155754955
Change-Id: I1758a554d58d569ff2d531af8d898a3fa6eb0fe8
Merged-In: I1758a554d58d569ff2d531af8d898a3fa6eb0fe8
diff --git a/host/commands/assemble_cvd/super_image_mixer.cc b/host/commands/assemble_cvd/super_image_mixer.cc
index ce75a67..23df66b 100644
--- a/host/commands/assemble_cvd/super_image_mixer.cc
+++ b/host/commands/assemble_cvd/super_image_mixer.cc
@@ -61,6 +61,7 @@
   "IMAGES/odm.img",
   "IMAGES/recovery.img",
   "IMAGES/userdata.img",
+  "IMAGES/vbmeta.img",
   "IMAGES/vendor.img",
 };