Add a log and statistics for notification expansion.
Bug: 16618854
Change-Id: I501f396fa495e1e55a27d7d0b65aac66495418c1
diff --git a/services/core/java/com/android/server/EventLogTags.logtags b/services/core/java/com/android/server/EventLogTags.logtags
index 6fab37c2..3c50947 100644
--- a/services/core/java/com/android/server/EventLogTags.logtags
+++ b/services/core/java/com/android/server/EventLogTags.logtags
@@ -65,6 +65,8 @@
27501 notification_panel_hidden
# when notifications are newly displayed on screen, or disappear from screen
27510 notification_visibility_changed (newlyVisibleKeys|3),(noLongerVisibleKeys|3)
+# when notifications are expanded, or contracted
+27511 notification_expansion (key|3),(user_action|1),(expanded|1)
# when a notification has been clicked
27520 notification_clicked (key|3)