Update voice OWNER file

Bug: 177641730
Test: n/a
Change-Id: Idc025cf9d7e9ccf2928aa54ef93f7ec51604a4e5
diff --git a/core/java/android/service/voice/OWNERS b/core/java/android/service/voice/OWNERS
index 59a0c2e..ec44100 100644
--- a/core/java/android/service/voice/OWNERS
+++ b/core/java/android/service/voice/OWNERS
@@ -1,3 +1,7 @@
 # Bug component: 533220
 
 include /core/java/android/app/assist/OWNERS
+
+# The owner here should not be assist owner
+liangyuchen@google.com
+tuanng@google.com