Change onRemoteEntry() to only fire when entries are removed

Conceptually, this should be a paired match with
onNotificationAdded(). Previously we were firing this method even
if the notification was no longer present (already removed) or
if it hadn't been added yet (was in pending).

Test: atest

Change-Id: I613f60aa8cf4e1aeb7bb13ff5883a221c9b623c6
13 files changed