added disable_vabc field to install_plan

Test: tested compilation. Applied OTA to cuttlefish instance with VABC
flag disabled.

Change-Id: I2d5756a58deb3d4bf7e80983294746c91aebeccb
diff --git a/payload_consumer/install_plan.h b/payload_consumer/install_plan.h
index 883aa60..1faa2e4 100644
--- a/payload_consumer/install_plan.h
+++ b/payload_consumer/install_plan.h
@@ -73,6 +73,7 @@
       ErrorCode* error);
 
   bool is_resume{false};
+  bool disable_vabc{false};
   std::string download_url;  // url to download from
   std::string version;       // version we are installing.