Replace is_interactive with interactive for consistency in the code.

Bug: none
Test: unittests
Change-Id: I8c98860cfeadb52c7f8e4931d2ad154ae4211d47
diff --git a/update_manager/android_things_policy.cc b/update_manager/android_things_policy.cc
index d4b9442..20d10d8 100644
--- a/update_manager/android_things_policy.cc
+++ b/update_manager/android_things_policy.cc
@@ -53,7 +53,7 @@
   result->updates_enabled = true;
   result->target_channel.clear();
   result->target_version_prefix.clear();
-  result->is_interactive = false;
+  result->interactive = false;
 
   // Build a list of policies to consult.  Note that each policy may modify the
   // result structure, even if it signals kContinue.