Merge "Consider prebuilt vendor.img as having vendor partition." am: 8a7b0dee am: 4a5a1e15

      print("target_files appears to already contain images.")

      sys.exit(1)

  has_vendor = os.path.isdir(os.path.join(OPTIONS.input_tmp, "VENDOR"))

  # vendor.img is unlike system.img or system_other.img. Because it could be

  # built from source, or dropped into target_files.zip as a prebuilt blob. We

  # consider either of them as vendor.img being available, which could be used

  # when generating vbmeta.img for AVB.

  has_vendor = (os.path.isdir(os.path.join(OPTIONS.input_tmp, "VENDOR")) or

                os.path.exists(os.path.join(OPTIONS.input_tmp, "IMAGES",

                                            "vendor.img")))

  has_system_other = os.path.isdir(os.path.join(OPTIONS.input_tmp,

                                                "SYSTEM_OTHER"))