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
diff --git a/stack/btm/btm_ble_gap.c b/stack/btm/btm_ble_gap.c
index 3fdbbcc..2f38fbd 100644
--- a/stack/btm/btm_ble_gap.c
+++ b/stack/btm/btm_ble_gap.c
@@ -3009,6 +3009,8 @@
             if ((p_acl_cb->in_use) && (p_acl_cb->hci_handle == handle))
             {
                 STREAM_TO_ARRAY(p_acl_cb->peer_le_features, p, BD_FEATURES_LEN);
+                /* notify link up here */
+                btm_establish_continue(p_acl_cb);
                 l2cble_notify_le_connection (p_acl_cb->remote_addr);
                 break;
             }