Add new refresh key constant.

Bug: 64149858
Bug: 64662317
Test: Builds and manual tests with Chromebook.

Change-Id: I02f890375f1a956867b04bf76f69d668fb3a7f98
diff --git a/include/input/InputEventLabels.h b/include/input/InputEventLabels.h
index c282cf0..4b33a96 100644
--- a/include/input/InputEventLabels.h
+++ b/include/input/InputEventLabels.h
@@ -324,6 +324,7 @@
     DEFINE_KEYCODE(SYSTEM_NAVIGATION_LEFT),
     DEFINE_KEYCODE(SYSTEM_NAVIGATION_RIGHT),
     DEFINE_KEYCODE(ALL_APPS),
+    DEFINE_KEYCODE(REFRESH),
 
     { NULL, 0 }
 };