Rename update_device.py's --disable-vabc param

update_device.py has a --disable-vabc option, and what it really does is
set virtual ab compression param to none, but still uses snapuserd.
There is also a --disable-vabc option in ota_from_target_files, which
completely disables virtual ab compression and fall back to plain vab.
To keep naming consistent, rename update_device.py's option to
--vabc-none.

Test: th
Change-Id: Ifba27f19ed8132bf1a3023481740461faa50207c
diff --git a/payload_consumer/delta_performer.cc b/payload_consumer/delta_performer.cc
index 0ec6a38..26c3d59 100644
--- a/payload_consumer/delta_performer.cc
+++ b/payload_consumer/delta_performer.cc
@@ -489,8 +489,8 @@
     // update estimate_cow_size if VABC is disabled
     // new_cow_size per partition = partition_size - (#blocks in Copy
     // operations part of the partition)
-    if (install_plan_->disable_vabc) {
-      LOG(INFO) << "Disabling VABC";
+    if (install_plan_->vabc_none) {
+      LOG(INFO) << "Setting Virtual AB Compression algorithm to none";
       manifest_.mutable_dynamic_partition_metadata()
           ->set_vabc_compression_param("none");
       for (auto& partition : *manifest_.mutable_partitions()) {