Refactor get partition path and IsVABC into separate function

Test: th
Change-Id: Ifb6efa1e63f5d5a047d18ac0876a1ecd860ba869
diff --git a/payload_consumer/filesystem_verifier_action.h b/payload_consumer/filesystem_verifier_action.h
index 78634cb..68a9432 100644
--- a/payload_consumer/filesystem_verifier_action.h
+++ b/payload_consumer/filesystem_verifier_action.h
@@ -91,6 +91,12 @@
   // remaining to be hashed, it finishes the action.
   void StartPartitionHashing();
 
+  const std::string& GetPartitionPath() const;
+
+  bool IsVABC(const InstallPlan::Partition& partition) const;
+
+  size_t GetPartitionSize() const;
+
   // Schedules the asynchronous read of the filesystem part of this
   // partition(not including hashtree/verity).
   void ScheduleFileSystemRead();