Notify that link is up after LE read remote features completes

ACL link up notifaction was not sent after LE read remote features was successful.
Thus, total ACL link up count was not updated. Included a link up notification
after LE read remote features is successfull.

Bug: 17410697
Change-Id: I41fc640e76fa99354cb63d9b0b3031582178c057