Renaming dtbo_node to dtbo_label

crosvm expects dtbo_label to find nodes's full path from __symbols__,
so we'd better to match naming.

Bug: 304643002
Change-Id: Iee3792f1203278d6dd261750d0dc318662783a11
Test: TH
diff --git a/virtualizationservice/schema/current.txt b/virtualizationservice/schema/current.txt
index ef99294..6e3fbb6 100644
--- a/virtualizationservice/schema/current.txt
+++ b/virtualizationservice/schema/current.txt
@@ -3,10 +3,10 @@
 
   public class Device {
     ctor public Device();
-    method public String getDtbo_node();
+    method public String getDtbo_label();
     method public String getKind();
     method public String getSysfs_path();
-    method public void setDtbo_node(String);
+    method public void setDtbo_label(String);
     method public void setKind(String);
     method public void setSysfs_path(String);
   }