Prevent duplicate notifications

Don't trust mNotificationData being sorted consistently
at all times...which it actually should. But apparently isn't.

Instead of using binary search to find the previous instance of
the notification when it's updated, use a simple linear scan.

Bug: 15589158
Change-Id: I7a09d0c64e35bd1930b8992d19da1393f4e4bb4e
1 file changed