Add arthuri@ to hardware/interfaces contexthub OWNERS

Test: None, OWNERS only

Change-Id: I01a4069eb4c65c0b4fedf6c5d5ff0251770a2741
diff --git a/contexthub/OWNERS b/contexthub/OWNERS
index f35961a..ccd385b 100644
--- a/contexthub/OWNERS
+++ b/contexthub/OWNERS
@@ -1,2 +1,3 @@
 # Bug component: 156070
 bduddie@google.com
+arthuri@google.com